Hi Stephen, thanks for the tip. Performancing only seems to work with blogs hosted at Blogger, Typepad, WordPress etc. Most of my blogs are hosted on my own servers so that doesn't really work for me. Nice extension though!
Hi Adriaan, thanks for your comment. I have been to the supports forum and the solution for the WordPress issue seems to be that it is a WordPress thing since the upgrade to version 2 (I tried replacing some of the problem files with older versions but that didn't work). As for the MovableType problem (it is a similar issue relating to uploading at least images), I ran a series of searches and didn't find anything meaningful on the support forum.