да, сегодня были
в логах nginx
2010/10/06 11:24:07 [alert] 12623#0: worker process 12625 exited on signal 6
2010/10/06 11:24:08 [alert] 12623#0: worker process 4325 exited on signal 11
2010/10/06 11:24:09 [alert] 12623#0: worker process 12824 exited on signal 11
2010/10/06 11:24:09 [alert] 12623#0: worker process 4340 exited on signal 11
2010/10/06 11:24:10 [alert] 12623#0: worker process 4335 exited on signal 11
2010/10/06 11:24:11 [alert] 12623#0: worker process 4369 exited on signal 11

в dmesg

nginx[22013]: segfault at 240b000 ip 0000003695c02646 sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[21983]: segfault at 244d000 ip 0000003695c0270a sp 00007fff99548ee8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[22028]: segfault at 240b000 ip 0000003695c02646 sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[22045]: segfault at 240b000 ip 0000003695c02646 sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[22033]: segfault at 240b000 ip 0000003695c0270a sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[21949]: segfault at 26b5000 ip 0000003695c0273b sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[22053]: segfault at 2680000 ip 0000003695c02677 sp 00007fff99548ee8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[15901]: segfault at 2682000 ip 0000003695c0273b sp 00007fff99548e48 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[15709]: segfault at 23d4000 ip 0000003695c02677 sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]
nginx[15714]: segfault at 23d4000 ip 0000003695c02677 sp 00007fff99548ea8 error 4 in libz.so.1.2.3[3695c00000+15000]