I strongly recommend anyone working with harddisc images to get a new CVS build - either compile or wait a while till PRIESTLYBOY makes a new one...
CANADACOW fixed FAT writing (file drive_fat.cpp) which means e.g. that the images are no longer corrupted when copying to them from normal DOSBOX shell. Very usefull thing... I briefly tested it, it looks ok.
There should be other improvements in future.
If you do not use this feature, you do not need a new version (this repair does not influence normal DOSBOX functionality).

Mirek