Hi Zer07even,
My cache permissions problem now seems resolved by approaching it as actually being a delete issue. I have not had a permissions error for for some time now and there has been increasing activity on the site.
Folder permissions are 777 ,cache files are created with permission 644 - these should not be changed, only folders.
After setting your folder permissions to 755 clear your cache.
I think the trick may be to then check your cache folders straight away for any stray 644 files and manually delete them via FTP or Cpanel.
Then any new cache files the system create it should also be able to delete correctly now under the folders with 777 permission. It is when the delete does not happen correctly (or in a timely manner) that the replacement, updated cache file cannot be written generating the error even with folders set 777
- Mark
