I'm running SVN trunk, and in Eclipse under 1.6, the new GUI shows up.
I also generated the jar files and created the regular project structure (in a separate directory), but when running under JDK 1.6, it is still showing the old gui.
This is the command line generated:
C:\findbugs_1.3\bin>start "FindBugs" "C:\Program Files\Java\jdk1.6.0\bin\javaw.exe" "-Dfindbugs.home=C:\findbugs_1.3\bin\.
." -Xmx384m -jar "C:\findbugs_1.3\bin\..\lib\findbugsGUI.jar"
Any thoughts on what could be causing this?