segfault with 8GB RAM on ubuntu 9.0.4

Currently it looks to me that only systems with 4GB or less are able to access pdf forms.

I have a bunch of systems which are quite identical besides there memory setup.

The systems with 4GB work well all with 8GB do give segfaults

--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigaction(SIGABRT, {0x1000000000000000, [], SA_STACK|SA_NOCLDSTOP|0x55560}, {0x84fc6f2, [QUIT ABRT BUS KILL ALRM STKFLT TSTP URG XCPU XFSZ VTALRM PROF WINCH IO PWR SYS RTMIN], 0}, 8) = 0
exit_group(1)

Any ideas?

cheers

Reimar