Comment 8 for bug 506436

No, I'm just a very considerate beta tester that lives on the edge. Crappy hardware is just a part of it. :)
Seriously, I tried again and got a backtrace this time:

Full thread dump:

"<unnamed thread>" tid=0x0x50a6f0 this=0x0x2fed8 thread handle 0x404 state : not waiting owns ()
  at System.Nullable`1<int>.get_Value () <0x00011>
  at Docky.Interface.DockPreferences.get_IconSize () [0x00028] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockPreferences.cs:162
  at Docky.Interface.DockWindow.get_IconSize () [0x00000] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockWindow.cs:486
  at Docky.Interface.DockWindow.<get_DockWidth>m__4F (Docky.Items.AbstractDockItem) [0x00000] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockWindow.cs:548
  at System.Linq.Enumerable/<Sum>c__AnonStorey2F`1<object>.<>m__60 (int,object) <0x0002b>
  at System.Linq.Enumerable.Sum<Docky.Items.AbstractDockItem, int> (System.Collections.Generic.IEnumerable`1<Docky.Items.AbstractDockItem>,System.Func`3<int, Docky.Items.AbstractDockItem, int>) <0x00073>
  at System.Linq.Enumerable.Sum<object> (System.Collections.Generic.IEnumerable`1<object>,System.Func`2<object, int>) <0x000d0>
  at Docky.Interface.DockWindow.get_DockWidth () [0x0000d] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockWindow.cs:548
  at Docky.Interface.DockWindow.UpdateMaxIconSize () [0x00095] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockWindow.cs:1769
  at Docky.Interface.DockWindow.DrawDock (Docky.CairoHelper.DockySurface) [0x00011] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockWindow.cs:1899
  at Docky.Interface.DockWindow.OnExposeEvent (Gdk.EventExpose) [0x000c3] in /home/bkoenig/tarballs/docky/Docky/Docky/Interface/DockWindow.cs:2413
  at Gtk.Widget.exposeevent_cb (intptr,intptr) <0x00069>
  at (wrapper native-to-managed) Gtk.Widget.exposeevent_cb (intptr,intptr) <0xffffffff>
  at (wrapper managed-to-native) Gtk.Application.gtk_main () <0x00004>
  at (wrapper managed-to-native) Gtk.Application.gtk_main () <0xffffffff>
  at Gtk.Application.Run () <0x0000a>
  at Docky.Docky.Main (string[]) [0x000ed] in /home/bkoenig/tarballs/docky/Docky/Docky/Docky.cs:95
  at (wrapper runtime-invoke) Docky.Docky.runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

"<threadpool thread>" tid=0x0x2695b70 this=0x0x2f258 thread handle 0x422 state : interrupted state owns ()

"<threadpool thread>" tid=0x0x7716b70 this=0x0x3c037d0 thread handle 0x430 state : interrupted state owns ()

"<threadpool thread>" tid=0x0x2919b70 this=0x0x2981d48 thread handle 0x4d4 state : interrupted state owns ()

"<unnamed thread>" tid=0x0x1cd2b70 this=0x0x3c03bb8 thread handle 0x418 state : interrupted state owns ()
  at (wrapper managed-to-native) System.Threading.Thread.Sleep_internal (int) <0x00004>
  at (wrapper managed-to-native) System.Threading.Thread.Sleep_internal (int) <0xffffffff>
  at System.Threading.Thread.Sleep (int) <0x0001c>
  at CPUMonitor.CPUMonitorDockItem.<CPUMonitorDockItem>m__0 () [0x0000b] in /home/bkoenig/tarballs/docky/StandardPlugins/CPUMonitor/src/CPUMonitorDockItem.cs:75
  at Docky.Services.SystemService/<RunOnThread>c__AnonStorey9.<>m__B () [0x00000] in /home/bkoenig/tarballs/docky/Docky.Services/Docky.Services/SystemService.cs:371
  at (wrapper runtime-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) <0xffffffff>