If one try to drag a file (icon file for instance) to a properties dialog, if the filename has a ":". it is rejected without a message.
Yes, at least with rox the filename is escaped and the ':' is replaced with %3a. Xfce currently does not support that. I don't think I'll have time to look into this soon, so if someone else wants to do this, that would be very much appreciated.
*** Bug 460 has been marked as a duplicate of this bug. ***
Won't fix for 4.2, but should work already in 4.3 SVN version.