Callbacks and the perl debugger

I recently switched from performing a slapcat followed by using 
Net::LDAP::LDIF to load the entire LDAP directory into memory for batch 
updating from the authoritative sources to using Net::LDAP with 
callbacks because the LDAP directory has grown too large to fit in 
memory on this system.

The problem I am having is that the callback subroutine which makes 
several checks and also sometimes updates the entry, causes the perl 
debugger to blow up with the 99 levels of nested subroutines error.

However, it runs without error without the debugger.  So, I'm guessing 
that the problem is the callback routine is taking too long to process 
each entry and the callbacks up are getting backed up.

Are there strategies for dealing with this problem in the debugger? 
(google hasn't been my friend today).

Thanks,
-- 
Frank Swasey                    | http://www.uvm.edu/~fcs
Sr Systems Administrator        | Always remember: You are UNIQUE,
University of Vermont           |    just like everyone else.
   "I am not young enough to know everything." - Oscar Wilde (1854-1900)