There was a recent post on comp.lang.perl.tk about MListbox leaking memory, when you make alot of entry changes. I recommended in a response to use HList, because it's methods allow reuse of entries. I actually thought you were the same
person who posted there, because he said the drawback to HList was no built-in sorting. Anyways...watch your memory
with MListbox, if you are doing alot of entry changes.