hi, Anyone has the same problem? After upgrading to 2.0.0.13-1.fc8 and reboot the machine, I cannot start firefox anymore. But before rebooting, I can start it. After mv .mozilla, I run strace -f firefox, and saw these messages: .... 6125 mmap2(0x3d95000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 29, 0x6a) = 0x3d95000 6125 close(29) = 0 6125 read(25, "<?xml version=\"1.0\"?>\n<blocklist"..., 4096) = 742 6125 gettimeofday({1206674202, 655239}, NULL) = 0 6125 read(27, 0xbfe57d2f, 1) = -1 EAGAIN (Resource temporarily unavailable) 6125 gettimeofday({1206674202, 655789}, NULL) = 0 6125 --- SIGSEGV (Segmentation fault) @ 0 (0) --- 6125 unlink("/home/hpt/.mozilla/firefox/oga9hyt6.default/lock") = 0 .....