I dunno if the big leap in version numbers signifies big changes "under the hood" of this plugin or not, but for the first time ever - and I've been using Quick Cache for 2 years now, on a lot of sites - it's causing a problem.
As others here have reported already, I just got an error. Specifically: "requires PHP v5.3+ error"
Problem is... I'm running 18.104.22.168. My host isn't even up to 4 yet, and they now want 5.3? WTF? Is this right.
The problem is so bad I had to FTP in and remove the plugin entirely.
I sure hope this gets fixed soon. Quick Cache has been my favorite (and recommended) caching plugin. But if it's not going to work, I'm going to have to switch... quick. Ahem.