I may be wrong, however after the redesign the general performance has been lost somewhere and still couldn't be found again.
Problems with loading of images had been noticed before, esp. with older images from 2007 and earlier.
The Upload tool works worse than ever (sometimes it takes 10 to 15 min. to open the window, the progress bar and indicators are missing or running endlessly) - it's no fun to upload images anymore.
Even worse:
Sending comments or joing the fanbase at other users doesn't show prompt results any more; my first reaction was: what did I do wrong?! Now I know better: the IF designers couldn't find all the bugs until now.
The same with galleries just uploaded: they don't exist, or half of the images are missing. In the meantime I know better: (see above)
And: please place this annoying RTA label somewhere else, it disturbs watching images (larger than 600 px) immensely.
I'm sure you will manage these problems, new releases always need some fixes until they work as designed.
Thanks a lot in advance
ultrafetish