As discussed on the Tools page, SUBtools is an Objective-C application that acts as an interface for a number of UNIX commandline applications. So if you encounter problems with SUBtools, chances are that it's an issue with one of the UNIX applications.
To help evaluate causes of strange behavior, you can select to keep the log files that are created during processing. This option is found in the SUBtools preferences window. Examining these log files should give you some hints regarding what the Unix applications are having issues with. The web sites for the individual Tools could also prove helpful.
Probably the best resource would be useful Mac video forums found here or here. You'll find lots of people there willing to help and with more knowledge about general video issues than I have. Also, I periodically read this forum and can chime in with specific SUBtools issues.
- None at this time: This is a fairly new app, so it's your job let me know about the issues that you run into :-)..
- None at this time: This is too new an application to know yet what are common problems. It's your job let me know about the issues that you run into and eventually I'll be able to fill in the common problems that you are running into.