Not that i have seen, but I left php mem at 512.i also upgraded my server for more memory, mostly due to sql needs, so i haven't worried about it. Been working on clean build with 1.5.8a and a fresh template. It may just be an unreasonable number of products to load at once. And ya, mom got back from a PEZ convention with a ton of new and previously out of stock stuff, so numbers went way up.