This release has been fixed to work around a bug in Gtk+ libs. This bug caused problems with the transparency of the popup windows. A new theme can be downloaded from the gtkpbbuttons section of the pbbuttons homepage.
The main improvement of this release is that it takes care of other running instances of itself. The newly launched program replaces the running instance, so that no more than one GtkPBButtons process is in memory at the same time.