Preview thumbnails on addon pages and addon preview-on-hover links are incredibly uglyyyyy.
Could you make it possible to use the original image and browser-reduce dimensions if its file size is reasonable (say, under 80 KB), or at least reduce the amount of compression of the jpeg thumbnail generator on those specific things.
I think it's currently set to something like 20%.
Here is an original addon screenshot, 69.9 KB @ 100% quality:
aaaaaaaaaaaand this is what it looks like on previews like the main page for downloading the addon (20%ish quality):
SPOILER ALERT: it looks like Blizzard's new FXAA option in WoW!
So it's only 10.5 KB, saving a good 59.4 KB sure but wow does that addon ever look hideous!
How often do people even click the thumbnail to view original if the addon itself is that small? :P
If the bandwidth savings are really that important, 60% quality provides a fine picture at a mere 23.1 KB.
I don't think there's many WoW players playing on dial-up, so I think it's safe to say this would be an okay change.
PS. 80% quality would be my choice!