Thank you so much!
Yes I have FTP (Shell) and FTP Client Access.
This is what I tried:
1. I renamed "posts.cache" to "postsALT.cacheALT" to make it not functioning
Error in widget: "No recent Facebook status updates to show. Did you configure the plugin properly? (only admins see this sentence)"
2. I deleted the intire content of the file "posts.cache" (wich I think I shouldn't do or?) Widget output: Wired Error message
3. I did try setting 0777 and 0755 for "posts.cache".
All the other directories are on 0755. No result.
Somehow it just does not renew the cache... because I can see all your settings in the posts.cache file.
Did I do what you ment to solve it?
Thank you. :-)