The original version of 5.1 was dated Feb 27.2006. There is a newer version of 5.1 dates March 8th, 2006, which I am going to call 5.1a out there. Those of you, who have access to the 5.1 download, should get it since they have modified a sufficient number of the files. Some of the bugs have been fixed with this version.
RC
Followup:
The 5.1a is missing the enableall.config file from the CuteEditor_Files\Configuration\AutoConfigure directory.