I uploaded our project icon, a 32x32 GIF and then a 32x32 PNG; both have transparent backgrounds, both were displayed on the project page with black backgrounds.
Issue #2857 was marked as a duplicate of this issue.
any updates on this?
If you look at my xml2csv-hg and xml2csv projects, you'll notice that the hg project successfully had a transparent icon set in 2010-01, but the git project has a black background - set today (2011-12).
Issue #3178 was marked as a duplicate of this issue.