Segfault Exiting psql

PostgreSQL hackers:

8.0.3 is working great for me on Mac OS X Tiger, but I do get a  
segfault every time I exit pssql:

psql(7466) malloc: *** error for object 0x1806600: incorrect checksum  
for freed object - object was probably modified after being freed,  
break at szone_error to debug
psql(7466) malloc: *** set a breakpoint in szone_error to debug
zsh: segmentation fault  /usr/local/pgsql/bin/psql -U postgres -d sharky

Anyone seen this before? Compiled with gcc 4.0 (Apple's).

Thanks!

David