Hello,
Besides our admin upload issue, we've also noticed that the upper set of appearance options in the settings section are not taking effect, basically everything from the uploaded logo down to the color scheme drop-down, which works.
As with the upload issue, we've tried installing fresh on both Ubuntu 10.04 and OSX 10.6 and the same problem exists. We've also tried installing 0.9.0, which works fine, then upgrading to 0.9.1. Same results. All of the other options in the Appearance settings take effect immediately.
Ideas?