This is happening to me, too…specifically when I go to blogs with flash video embedded from youtube or other hosting sites on the web. Here is as much as I could get of the bug report:
System: Linux 2.6.25.18-0.2-pae #1 SMP 2008-10-21 16:30:26 +0200 i686
X Vendor: The X.Org Foundation
X Vendor Release: 10400090
Selinux: No
Accessibility: Disabled
GTK+ Theme: Gilouche
Icon Theme: Gilouche
Memory status: size: 0 vsize: 0 resident: 0 share: 0 rss: 0 rss_rlim: 0
CPU usage: start_time: 0 rtime: 0 utime: 0 stime: 0 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 0
----------- .xsession-errors ---------------------
(firefox:27102): GLib-GObject-CRITICAL **: g_object_unref: assertion G_IS_OBJECT (object)' failed (firefox:27102): GLib-GObject-CRITICAL **: g_object_unref: assertion
G_IS_OBJECT (object)’ failed
(firefox:27102): GLib-GObject-CRITICAL **: g_object_unref: assertion G_IS_OBJECT (object)' failed (firefox:27102): GLib-GObject-CRITICAL **: g_object_unref: assertion
G_IS_OBJECT (object)’ failed
(firefox:27102): GLib-GObject-CRITICAL **: g_object_unref: assertion G_IS_OBJECT (object)' failed (firefox:27102): GLib-GObject-CRITICAL **: g_object_unref: assertion
G_IS_OBJECT (object)’ failed
Flash Player: Warning: environment variable G_FILENAME_ENCODING is set and is not UTF-8
Flash Player: Warning: environment variable G_FILENAME_ENCODING is set and is not UTF-8
18cb70c2-3e52-77cb-6f308769-18c78f1f is dumped
MDRawHeader
signature = 0x504d444d
version = 0xa793
stream_count = 6
stream_directory_rva = 0x20
checksum = 0x0
time_date_stamp = 0x491e6864 2008-11-15 06:12:52
flags = 0x0
mDirectory[0]
MDRawDirectory
stream_type = 3
location.data_size = 532
location.rva = 0x68
mDirectory[1]
MDRawDirectory
stream_type = 4
location.data_size = 50008
location.rva = 0x6ea0
mDirectory[2]
MDRawDirectory
stream_type = 7
location.data_size = 56
location.rva = 0x20938
mDirectory[3]
MDRawDirectory
stream_type = 6
location.data_size = 168
location.rva = 0x20a08
mDirectory[4]
MDRawDirectory
stream_type = 15
location.data_size = 44
location.rva = 0x20d80
mDirectory[5]
MDRawDirectory
stream_type = 1197932545
location.data_size = 12
location.rva = 0x20db0
Streams:
stream type 0x3 at index 0
stream type 0x4 at index 1
stream type 0x6 at index 3
stream type 0x7 at index 2
stream type 0xf at index 4
stream type 0x47670001 at index 5
MinidumpThreadList
thread_count = 11
thread[0]
MDRawThread
thread_id = 0x69de
suspend_count = 0
priority_class = 0x0
priority = 0x0
teb = 0x0
stack.start_of_memory_range = 0xbfdd6a9c
stack.memory.data_size = 0x3c0c
stack.memory.rva = 0x280
thread_context.data_size = 0x2cc
thread_context.rva = 0x3e90
MDRawContextX86
context_flags = 0x1000f
dr0 = 0x0
dr1 = 0x0
dr2 = 0x0
dr3 = 0x0
dr6 = 0x0
dr7 = 0x0
float_save.control_word = 0xffff037f
float_save.status_word = 0xffff0027
float_save.tag_word = 0xffffffff
float_save.error_offset = 0x0
float_save.error_selector = 0x0
float_save.data_offset = 0x0
float_save.data_selector = 0x0
float_save.register_area[80] = 0x00000000000000d706c000000000000000fc054000000000000000d7064000000000000000a00440000000000000808707400000000000000000000000008c48fefffffffd3f0000000000c0a39bf73f
float_save.cr0_npx_state = 0x0
gs = 0x33
fs = 0x0
es = 0x7b
ds = 0x7b
edi = 0xa6ca4000
esi = 0xaa30c788
ebx = 0xaa30a990
edx = 0xa681a090
ecx = 0x0
eax = 0x1
ebp = 0xbfdd6b48
eip = 0x2d335f34
cs = 0x73
eflags = 0x10246
esp = 0xbfdd6a9c
ss = 0x7b
extended_registers[512] = 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
ds = 0x7b
edi = 0x3b
esi = 0xb1035278
ebx = 0xb3f8968
edx = 0x3b
ecx = 0x80
eax = 0xfffffdfc
ebp = 0xb10352bc
eip = 0xffffe430
cs = 0x73
eflags = 0x202
esp = 0xb1035264
ss = 0x7b
extended_registers[512] = 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Stack
0xbc5203b13b0000008000000042fff9b7000000003b000000feb89a3b1d0000000000000000000000f4efc7b758a3ba0864893f0bd85203b1eee8c6b764893f0b58a3ba08bc5203b1c50afab7f4efc7b760ea0000e8030000
thread[8]
MDRawThread
thread_id = 0xacf
suspend_count = 0
priority_class = 0x0
priority = 0x0
teb = 0x0
stack.start_of_memory_range = 0xabc25300
stack.memory.data_size = 0x1a8
stack.memory.rva = 0x61b8
thread_context.data_size = 0x2cc
thread_context.rva = 0x6360
MDRawContextX86
context_flags = 0x1001f
dr0 = 0x0
dr1 = 0x0
dr2 = 0x0
dr3 = 0x0
dr6 = 0x0
dr7 = 0x0
float_save.control_word = 0xa6824040
float_save.status_word = 0x80
float_save.tag_word = 0x9
float_save.error_offset = 0x0
float_save.error_selector = 0x9
float_save.data_offset = 0xabc25358
float_save.data_selector = 0xfffffe00
float_save.register_area[80] = 0x7b0000007b0000000000000033000000f000000030e4ffff73000000920200000053c2ab7b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000