Postgres segfaults on raster query

[Scott]

Here's what's happening:

psql -d mydb
select rid from rastertable where rid = 1;

Psql connection drops, postgres segfaults and restarts.

BUT, if I do a query such as this FIRST:

select postgis_full_version();

Then do other raster queries, it works fine. I suspect I broke something 
but I'm not sure where to start.

Thanks for any help.
Scott