There is a problem with caching images. I have two images: dir1/01.jpg and dir2/01.jpg. So in the "ImageGallery" these files will have  the same previews.

The second problem: when I get the insert image dialog in FF by double clicking on image in HTML editor and then try to select folder, I have a problem with MAC identity. The error doesn't appears when I get the insert image dialog by clicking the corresponding button on the toolbar.