On Tue, Apr 15, 2008 at 8:24 PM, FL <lengyel AT gmail DOT com> wrote:
>  *** glibc detected *** amcheck: double free or corruption (fasttop):  
> 0x083bef40 ***

Uh-oh!  I could probably come up with 50 bugfixes that this might
correspond to over the last two years.  If you're committed to
2.5.0p2, then all I can suggest is to build with debugging symbols and
run amcheck under 'gdb' to see what's getting double-freed.
Alternately, you could build a shim lib that stubs out free()
altogether -- amcheck isn't a daemon, so leakage won't hurt too badly.

If you're not committed to 2.5.0p2, then upgrading to 2.6.0 (or at
least 2.5.2p1) would be better.

Dustin

-- 
Storage Software Engineer
http://www.zmanda.com