It irks me when I am searching for a solution to a problem I have, get a few dozen hits on google, but all I get are people stating the same problem. Here is my attempt at improving the scoring of solutions.
In gdb 6.0 there is a frequently seen problem where the debugger complains about "Error while mapping shared library sections". I was unable to find the real cause of this, but this link stated that an upgrade to gdb 6.1 fixes the problem. There is also a link to a related redhat bugzilla bug entry.