I've been trough all the forum posts as well as readme file, and I've googled this - but nothing helps...
After I activate wp super cache my site becomes very slow... all of the appropriate folders in wp-content ahve the 777 permission, and files do get cached...
Maybe it's one of my plugins? This is what I use:
AddToAny: Share/Bookmark/Email Button
All in One SEO Pack
Get Recent Comments
Google XML Sitemaps
Post Templates by Category
Simple Tags (RC1.2)
Top Level Categories
WP Private Messages
WP Super Cache