… own progress instance the back buffer caused minor issue on OSX (rect around bars would be twice as opaque as the rest of the panel) and a worse issue w/ unity on ubuntu (rect around bars would be black).
fixes issue w/ Windows
Credit for the patch goes to James Brown (gartholomew) http://sourceforge.net/tracker/?func=detail&aid=3398247&group_id=49197&atid=455410
this will force re-validation of the field, updating the diplayed message if necessary.
examine all other checked dependencies to make sure the dependency is not required by any of them before allowing the user to de-select the feature.