Description of problem:
alt+tab between two open Firefox windows.  One window contained an open Flash video.

Version-Release number of selected component:
cinnamon-2.2.7-1.fc20

Additional info:
reporter:       libreport-2.2.2
backtrace_rating: 4
cmdline:        cinnamon --replace
crash_function: intel_miptree_used_for_rendering
executable:     /usr/bin/cinnamon
kernel:         3.14.4-200.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 intel_miptree_used_for_rendering at intel_mipmap_tree.h:696
 #1 brw_update_renderbuffer_surface at brw_wm_surface_state.c:620
 #2 brw_update_renderbuffer_surfaces at brw_wm_surface_state.c:702
 #3 brw_upload_state at brw_state_upload.c:645
 #4 brw_try_draw_prims at brw_draw.c:487
 #5 brw_draw_prims at brw_draw.c:581
 #6 vbo_draw_arrays at vbo/vbo_exec_array.c:661
 #7 vbo_exec_DrawArrays at vbo/vbo_exec_array.c:813
 #8 _mesa_DrawArrays at vbo/vbo_exec_array.c:1882
 #9 _mesa_meta_glsl_Clear at drivers/common/meta.c:2430