in addition.... you can try following the directions in the howt0-gwebcache.

Basically, try this...
go tools > preferences > network tab > advanced button

in the webcache tab , delete all the caches.
( or just edit cachehosts.txt in the xolox folder)

Then go here www.xolox.nl/test/test.html and import a new list.

This is only a suggestion of something to try.