I installed the minishowcase both; locally on my iMAC 10.6.4 with MAMP and on the server. It's fantastic working and really easy to handle, great showcase.
The only issu I see now is online, the smaller thumbnails of the navigation bar (above the large images) don't show and a missing icon is shown instead. no idea why that would be. I have plenty of other images, etc with other script and no problems, so I can't think that this will be any problem with the GD...
Thanks a lot