Regarding Quick Cache v131121
It's been a rough day for several Quick Cache users. Before this rewrite, the last update to Quick Cache occurred in 2011. So, any change after so long tends to cause confusion. With this rewrite, we ran several tests over the course of a 3 week period, but now that it's out in the wild there have been some important issues reported by our most loyal users; and we're working through these carefully.
@everyone You can monitor our progress here if you'd like. See: https://github.com/WebSharks/Quick-Cache/issues?state=closed We've taken care of all reproducible bug reports filed yesterday.
Thanks for your patience.
We released a new (improved) version of Quick Cache this morning with some of these latest bug reports having been resolved. Get Quick Cache v131127 here. http://wordpress.org/plugins/quick-cache/
You can keep tabs on our progress here if you like.
Regarding PHP v5.3 and parse errors.
Please see: https://github.com/WebSharks/Quick-Cache/issues/13