E250 Server Solaris 5.7 crashs with kernel panic

Solaris 5.7 is crashing with the following errors. Has anybody come across
this ? Any help is appreciated.

Mar 16 19:05:49 unix: kernel memory allocator:
Mar 16 19:05:49 unix: invalid free: buffer not in cache
Mar 16 19:05:49 unix: buffer=30004183b30 bufctl=0 cache: kmem_alloc_8
Mar 16 19:05:49 unix: panic[cpu1]/thread=2a100009d60:
Mar 16 19:05:49 unix: kernel heap corruption detected
Mar 16 19:05:49 unix:

[439 byte] By [CodeProf.com] at [2007-12-25 3:03:00]