Version 1.1.1 which uses gtk2 is available now. Most of the changes are gtk2 related although there are a couple of bug fixes thrown in also.
Version 1.0.0 has been released. The 1.0 series will be the last to use gtk+1.2. Future releases will be based on gtk+2 however maintenance releases on the 1.0 series will be done as needed.
The source for gtapecalc is now available through CVS at http://sourceforge.net/cvs/?group_id=1412