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

Fixed Bugs Include:-

• Rewrote most of the upload handler that is the recipient of the flash control. This should now work in situations where the permissions on a page have been restricted.
• The photo moderation message will no longer appear on the upload page when photo moderation has been switched off.
• The tags textbox will no longer appear on step 3 of the uploader when tags have been disabled.

Thanks again for all your feedback!