[plug] Debian puzzle, very weird.

[Craig Ringer]

> Segfaults on sync? Can you get stack traces from Linux core dumps?

try (if you can on the box) ulimit -c 1000000
(to allow core dumps) then run an offending command. using gdb get a 
"bt" and post that - perhaps it'd be informative combined with the 
strace output. Then again, all the binaries are probably stripped so 
you'll get something mostly useless.

#0  0x40153652 in select () from /lib/libc.so.6
(gdb) bt
#0  0x40153652 in select () from /lib/libc.so.6
#1  0xbfffedf0 in ?? ()
#2  0x4008a907 in __libc_start_main () from /lib/libc.so.6