Thanks for your work, Donncha :)
I'm trying WP-Super-Cache on 2.6
The installation went very smooth and the caching is working except for the Super-Cache files.
WP-Cache shows cached and expired files, but WP-Super-Cache shows 0 files.
In the cache directory I see folders with the file names but nothing in the folders.
The directory is 755 CHMOD as it was created during the installation.
I did try it in "Lock Down" mod and it seams to me that the speed is slower than in normal caching mod. Is that normal or not.