We use dozens of thumbnail graphs to display design data, such as line graphs.
The new way that thumbnails are displayed (Confluence 3.3 vs 2.10) is slower and less flexible than the old way.

The only problem with the old way was that the expanded view window did not get raised each time, so it might get buried.
Aside from that, it was much better, especially when reviewing a page with several thumbnails. The old method allowed animation of the content (one frame per mouse click). This was a good way to compare two similar images.

The 3.3 method requires two clicks to go from one image to the next, and the intervening shrink and grow animations totally defeat the animation and visual comparison of content.

1) Please provide an option to disable the animation of thumbnails. These are slow and distracting from the content on a local network and agonizing on a slow link.
2) Please provide a way to reposition and resize the expanded view. This should be remembered for the next expanded view use.
This allows quicker picking through multiple thumbnails.
3) Best: go back to the old way, just raise the window each time a new thumbnail is loaded.

I understand that the new method was a response to complaints about popup blockers preventing the old method. We don't see that, though Firefox blocks popups by default. We think think the solution is worse than the problem. Much worse.

Note
Disabling the "fancybox web resources" module would workaround this problem, but causes other parts of Confluence to break, such as the Insert Image dialog.