One of the biggest helps might be to install the new STRFREE and DISPOSE macros in the general forum. I haven't added those to the FUSS packages yet because I'm not sure they're entirely safe yet. Would like to see a few more reports on that one way or the other before committing it.
If it's genuine memory leaks you're looking for, you should see if your host would be willing to install Valgrind for you and then use that to track them all down. It's going to be a painful process, but eventually you should be able to find them.