Ya me ha pasado varias veces,asi que he probado a abrirlo desde la consola para ver cual es el mensaje de error:

A fatal error has occurred and aMule has crashed.
Please assist us in fixing this problem by posting the backtrace below in our
'aMule Crashes' forum and include as much information as possible regarding the
circumstances of this crash. The forum is located here:
http://forum.amule.org/index.php?board=67.0
If possible, please try to generate a real backtrace of this crash:
http://wiki.amule.org/index.php/Backtraces

----------------------------=| BACKTRACE FOLLOWS: |=----------------------------
Current version is: aMule 2.2.6 using wxGTK2 v2.8.11
Running on: Linux 2.6.32-23-generic i686

[2] CamuleApp::OnFatalException() in amule[0x80846b9]
[3] wxFatalSignalHandler in /usr/lib/libwx_baseu-2.8.so.0[0xaf7226]
[4] ?? in [0xcdd400]
[5] ?? in /usr/lib/libwx_gtk2u_core-2.8.so.0[0x7eed74]
[6] ?? in /usr/lib/libgdk-x11-2.0.so.0[0xb9a32c]
[7] ?? in /lib/libglib-2.0.so.0[0x6130efb]
[8] g_main_context_dispatch in /lib/libglib-2.0.so.0[0x60ec5e5]
[9] ?? in /lib/libglib-2.0.so.0[0x60f02d8]
[10] g_main_loop_run in /lib/libglib-2.0.so.0[0x60f0817]
[11] gtk_main in /usr/lib/libgtk-x11-2.0.so.0[0x10a43c9]
[12] wxEventLoop::Run() in /usr/lib/libwx_gtk2u_core-2.8.so.0[0x7ed5c8]
[13] wxAppBase::MainLoop() in /usr/lib/libwx_gtk2u_core-2.8.so.0[0x8804ee]
[14] wxAppBase::OnRun() in /usr/lib/libwx_gtk2u_core-2.8.so.0[0x8800e1]
[15] wxEntry(int&, wchar_t**) in /usr/lib/libwx_baseu-2.8.so.0[0xa8dd93]
[16] wxEntry(int&, char**) in /usr/lib/libwx_baseu-2.8.so.0[0xa8df77]
[17] main in amule[0x8159dab]
[18] __libc_start_main in /lib/tls/i686/cmov/libc.so.6[0xe29bd6]
[19] _start in amule[0x8083661]

Por si sirve de algo,pongo lo que me sale cuando lo inicio desde la consola..

Initialising aMule 2.2.6 using wxGTK2 v2.8.11
Checking if there is an instance already running...
No other instances are running.
ListenSocket: Ok.
HTTP download thread started
Loading temp files from /media/sda5/aMule/temp.
Loading PartFile 67 of 67
All PartFiles Loaded.
Adding file /media/sda5/aMule/temp/037.part.met to shares
Adding file /media/sda5/aMule/temp/038.part.met to shares
Adding file /media/sda5/aMule/temp/039.part.met to shares
Adding file /media/sda5/aMule/temp/040.part.met to shares
Adding file /media/sda5/aMule/temp/041.part.met to shares
Adding file /media/sda5/aMule/temp/042.part.met to shares
Adding file /media/sda5/aMule/temp/043.part.met to shares
Adding file /media/sda5/aMule/temp/044.part.met to shares
Adding file /media/sda5/aMule/temp/045.part.met to shares
Adding file /media/sda5/aMule/temp/046.part.met to shares
Adding file /media/sda5/aMule/temp/047.part.met to shares
Adding file /media/sda5/aMule/temp/048.part.met to shares
Adding file /media/sda5/aMule/temp/049.part.met to shares
Adding file /media/sda5/aMule/temp/050.part.met to shares
Adding file /media/sda5/aMule/temp/052.part.met to shares
Adding file /media/sda5/aMule/temp/070.part.met to shares
Adding file /media/sda5/aMule/temp/069.part.met to shares
Adding file /media/sda5/aMule/temp/068.part.met to shares
Adding file /media/sda5/aMule/temp/067.part.met to shares
Adding file /media/sda5/aMule/temp/066.part.met to shares
Adding file /media/sda5/aMule/temp/064.part.met to shares
Adding file /media/sda5/aMule/temp/063.part.met to shares
Adding file /media/sda5/aMule/temp/062.part.met to shares
Adding file /media/sda5/aMule/temp/061.part.met to shares
Adding file /media/sda5/aMule/temp/060.part.met to shares
Adding file /media/sda5/aMule/temp/059.part.met to shares
Adding file /media/sda5/aMule/temp/058.part.met to shares
Adding file /media/sda5/aMule/temp/057.part.met to shares
Adding file /media/sda5/aMule/temp/056.part.met to shares
Adding file /media/sda5/aMule/temp/055.part.met to shares
Adding file /media/sda5/aMule/temp/054.part.met to shares
Adding file /media/sda5/aMule/temp/017.part.met to shares
Adding file /media/sda5/aMule/temp/015.part.met to shares
Adding file /media/sda5/aMule/temp/014.part.met to shares
Adding file /media/sda5/aMule/temp/013.part.met to shares
Adding file /media/sda5/aMule/temp/012.part.met to shares
Adding file /media/sda5/aMule/temp/011.part.met to shares
Adding file /media/sda5/aMule/temp/009.part.met to shares
Adding file /media/sda5/aMule/temp/008.part.met to shares
Adding file /media/sda5/aMule/temp/007.part.met to shares
Adding file /media/sda5/aMule/temp/006.part.met to shares
Adding file /media/sda5/aMule/temp/005.part.met to shares
Adding file /media/sda5/aMule/temp/004.part.met to shares
Adding file /media/sda5/aMule/temp/003.part.met to shares
Adding file /media/sda5/aMule/temp/002.part.met to shares
Adding file /media/sda5/aMule/temp/001.part.met to shares
Adding file /media/sda5/aMule/temp/035.part.met to shares
Adding file /media/sda5/aMule/temp/034.part.met to shares
Adding file /media/sda5/aMule/temp/033.part.met to shares
Adding file /media/sda5/aMule/temp/032.part.met to shares
Adding file /media/sda5/aMule/temp/031.part.met to shares
Adding file /media/sda5/aMule/temp/030.part.met to shares
Adding file /media/sda5/aMule/temp/029.part.met to shares
Adding file /media/sda5/aMule/temp/028.part.met to shares
Adding file /media/sda5/aMule/temp/027.part.met to shares
Adding file /media/sda5/aMule/temp/026.part.met to shares
Adding file /media/sda5/aMule/temp/025.part.met to shares
Adding file /media/sda5/aMule/temp/024.part.met to shares
Adding file /media/sda5/aMule/temp/023.part.met to shares
Adding file /media/sda5/aMule/temp/020.part.met to shares
Adding file /media/sda5/aMule/temp/018.part.met to shares
No shareable files found in directory: /media/sdb1/Musica
No shareable files found in directory: /media/sdb1/Musica/AcDc.-.Complete.Discog
raphy.From.1975.To.2000/AcDc - 1992 - Live (Special Collector's Edition)
No shareable files found in directory: /media/sdb1/Musica/AcDc.-.Complete.Discog
raphy.From.1975.To.2000/AcDc - 1997 - Bonfire
No shareable files found in directory: /media/sdb1/Musica/AcDc.-.Complete.Discog
raphy.From.1975.To.2000/AcDc - 1997 - Bonfire/02 -Let There Be Rock-The Movie-Li
ve In Paris
No shareable files found in directory: /media/sdb1/Musica/CarlosGoñi
No shareable files found in directory: /media/sdb1/Musica/CarlosGoñi/REVOLVER
No shareable files found in directory: /media/sdb1/Musica/Platero Y Tu Fito Y Fi
tipaldis (1991-2005) Discografia Completisima
No shareable files found in directory: /media/sdb1/Musica/Platero Y Tu Fito Y Fi
tipaldis (1991-2005) Discografia Completisima/Fito y los Fitipaldis
No shareable files found in directory: /media/sdb1/Musica/Platero Y Tu Fito Y Fi
tipaldis (1991-2005) Discografia Completisima/Fito y los Fitipaldis/Fito y los F
itipaldis
No shareable files found in directory: /media/sdb1/Musica/Platero Y Tu Fito Y Fi
tipaldis (1991-2005) Discografia Completisima/Fito y los Fitipaldis/Fito y los F
itipaldis/Videos
No shareable files found in directory: /media/sdb1/Musica/Platero Y Tu Fito Y Fi
tipaldis (1991-2005) Discografia Completisima/Platero y tu/(96) A Pelo (Directo
)
No shareable files found in directory: /media/sdb1/Top Of The Pops No.1's - 3cd'
s
No shareable files found in directory: /media/sdb1/VA-Top_Of_The_Pops_The_80s-3C
D-2008-404
Host: amule.sourceforge.net:80
URL: http://amule.sourceforge.net/lastversion
Response: 200 (Error: 0)
Download size: 6
HTTP download thread ended

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -
1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -
1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -
1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -
1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -
1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -
1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

** (amule:9397): CRITICAL **: murrine_style_draw_box_gap: assertion `height >= -1' failed

Muchas gracias por la ayuda!