This error happens with WordPress while uploading. My hosting OS is Home windows.

It gives a mistake near to this:

Could not upload the  file ... \a\b\c\wp-content/uploads/2011/01

Are you aware what the issue is? How do i alter the directory separator in WordPress? (If this sounds like the answer?)

In PHP that you can do define('DS', DIRECTORY_SEPARATOR) after which anywhere a hyperlink is concatenated you must have the DS in the centre to ensure that it'll focus on both Home windows and Linux servers.