Unity 3.4 crashes on objects destruction

Hello, I have prefabs in my scene, i destroy some of it and i instantiate others. At this moment, Unity crashes 95% of the times.I work on Widows Xp 32 bits.

The error log says : Unity.exe caused an Access Violation (0xc0000005) in module Unity.exe at 001b:00a01ff9.

 Error occurred at 2011-08-08_160724.
 C:\ProgramFiles\Unity\Editor\Unity.exe, run by yann.
  67% memory in use. 2048 MB
  physical memory [660 MB free]. 3941 MB
  paging file [2683 MB free]. 2048 MB
  user address space [1492 MB free].
  Read from location 1c0e9000 caused an
  access violation.

And the log.txt :

 ERROR [2011-08-08 16:16:34Z]: GdkPixbuf-Critical: gdk_pixbuf_composite: assertion `dest_x >= 0 && dest_x + dest_width <= dest->width' failed
 Stack trace: 
    à Gdk.Pixbuf.Composite(Pixbuf dest, Int32 dest_x, Int32 dest_y, Int32 dest_width, Int32 dest_height, Double offset_x, Double offset_y, Double scale_x, Double scale_y, InterpType interp_type, Int32 overall_alpha)

I have seen in other topics the 3.4 release crashes for some of the users, someone can confirm that's a bug or is it my program?

Thanks