We are getting a good number of enquiries about Xslimmer's current version with Leopard. As far as we now, it should work fine: we have tested it out with all developer betas and it did.
Developers did not get the Leopard final build before the general public, so we are now in the process to test it thoroughly with the commercial release to see if there are any new issues we should cope with, although they are not anticipated so far.
On the other hand, apps in Leopard may contain additional architectures with 64-bit versions of the binaries in addition to the usual 32-bit versions. We are now beta testing a new Xslimmer release that is optimized for this situation. Hopefully, it will be released in a few days.