This post is more than 2 years old.
A Galleon user reported an odd issue when he moved his forums to a new host. All of a sudden attachment uploads stopped working. I did some debugging with him and it turned out that ColdFusion's getTempDirectory function was returning a blank value! Turns out this has happened to a few others, and Ben Nadel documents his run in with it here. I updated Galleon to default to using getTempDirectory for uploads but to allow for a specific folder in the settings file. I'll also be updating other apps in the future with a similar workaround.