I was convinced that Tk leaked like a sieve and then I heard that Perl created circular references that prevent subroutines from being garbage collected. This prompted me to rework my Tk applications so that I didn't use convenient closures but instead reused (more complicated) static subroutines. This got rid of all my leaks.

So, for example, I switched from using

    -command => sub { MyRefresh($row,"force") },
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to using

    -command => [ \&MyButton, "refresh",$row,"force" ],
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This memory leak problem was identified a long time ago so I think it is fixed in Perl v5.8, but I haven't verified that. I know it isn't fixed in Perl v5.6.

                - tye