I've posted a new build for Simple Gallery in the downloads section (members only).

Fixed Bugs Include:-

• Fixed an issue caused by file names that had the ".." characters in it. (if you have files like this already uploaded, you will have to re-upload them, they probably are broken thumbnails as is)
• Fixed an issue caused by file names having the ' charcter in it. You won't have to re-upload these files.
• Fixed an issue caused by the RSS feed and logging out of child portals.

Thanks again for all your feedback!