Description of problem:
Crash occurs after clicking on "preferences" in the "edit" menu.

Version-Release number of selected component:
rhythmbox-2.98-4.fc18

Additional info:
backtrace_rating: 4
cmdline:        rhythmbox
crash_function: case_insensitive_hash
executable:     /usr/bin/rhythmbox
kernel:         3.6.6-3.fc18.x86_64
remote_result:  NOTFOUND
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 case_insensitive_hash at fonts.c:757
 #1 pango_font_description_hash at fonts.c:786
 #2 pango_fc_fontset_key_hash at pangofc-fontmap.c:407
 #3 g_hash_table_lookup_node at ghash.c:401
 #4 g_hash_table_lookup at ghash.c:1074
 #5 pango_fc_font_map_load_fontset at pangofc-fontmap.c:1733
 #6 pk_pango_fc_font_map_load_fontset at pk-gtk-module.c:247
 #7 itemize_state_update_for_new_run at pango-context.c:1356
 #8 itemize_state_process_run at pango-context.c:1395
 #9 itemize_with_font at pango-context.c:1558