I have used Stuffit Deluxe 9 (9.0.2) for as long as it's been available... forget 10, forget 11... Especially if you're on a PPC... don't even bother!!!! If you can find yourself a copy of SD9 then jump on it!... One tip... you need to install the 9.0.1 update, THEN the 9.0.2 update... however: the 9.0.2 update gives the wrong information (i think it says something like it is actually gonna install 9.0.1 again or seomthing...) Don't believe, just go ahead and proceed with the 9.0.2 install even if it says it's already there, or it says it's gonna install a different version (if you have the right installer, it will give the wrong info, so beware, and update anyway... i've done this many times on all my macs, but haven't reinstalled in a while, so i don't remember exactly the wrong info it gives.)!!!

SD9 never gives me grief!!!!!
(of course it is missing one or two formats that are only common for certain non-standard compression, but there are free apps for these gaps!)