Message1260

Oops, actually I misread your bug report and am not really confirming it. 

CPython doesn't look at ctime at all; it looks at mtime, but records mtime in the .pyc file and then rebuilds if 
<pyc mtime> != <py mtime>.

For Jython: can we record the original mtime in the .class file through some extension mechanism?  Or, you could add a private attribute to the generated class... but that might mean importing the class in order to check the mtime.