Comment 2 for bug 1039918

StacktraceTop:
 memmove (__len=30724, __src=<optimized out>, __dest=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/string3.h:58
 drisw_update_tex_buffer (drawable=<optimized out>, ctx=<optimized out>, res=<optimized out>) at drisw.c:272
 dri_set_tex_buffer2 (pDRICtx=<optimized out>, target=3553, format=8410, dPriv=<optimized out>) at dri_drawable.c:234
 TfpTexture::enable (this=0x6d5f680, filter=GLTexture::Good) at /build/buildd/compiz-0.9.8+bzr3249/plugins/opengl/src/texture.cpp:599
 enableFragmentOperationsAndDrawGeometry (mask=720896, filter=GLTexture::Good, attrib=..., texture=0x6d5f680, w=0x65424d0, gs=0x2071520) at /build/buildd/compiz-0.9.8+bzr3249/plugins/opengl/src/paint.cpp:1106