Interesting... it doesn't soak up memory on my Linux Perl 5.005_03 or my Win32 ActiveState Perl 5.6, but it does on my Linux v5.6 and my Win32 Cygwin 5.6...

update: as lemming pointed out, it actually does leak memory under 5.005_03, only very very slowly. It's more of a drip, than a leak, really.