I noticed a small issue when resizing. The progress meter is stuck at the original length. The grey area doesn’t fill out to the end of the meter. It still displays the correct length and the blue progress bar is also limited to the smaller area.
Another small issue is that I get both vertical and horizontal scrollbars unless I maximize the window. I think that the browser interprets 100% width and height as the total windowed area, but when you try to populate it it adds margins to your 100% width.
I use Firefox 18.104.22.168 on WinXP
The progress bars are corrected in 0.78. I can’t replicate your problem with the scrollbars though. I assume you’re talking about the FireFox scrollbars?
I use 22.214.171.124 on WinXP.