you're not alone ... i ran into the same thing earlier this week. a quick web search revealed several notes from last summer recounting similar problems on perl 5.7x on the mac osx, but no resolutions were offered. not having time to get deeply into the ptkdb module, i just went back to using the 5.6.1 that i had left on the system.
Comment on Re: How ptkdb could be made to work with perl-5.8.0+Tk-800.024?