Agreed. Most of the time companies will allow the release of OSS changes as long as not core intellectual property is released. As long as you don't post the fix without consent (GET IT IN WRITING!!) you're fine. If they don't allow the release, well, you have to remember, you were paid for the work, so it's their choice..

If your environment allows for it, i.e. OpenSource or you have the money for the license, why not Qt. It adds a degree of portability to the application and is a fairly easy api to code to. Just another idea at any rate.