Thanks for your advice, captain 2-post.
Most programs
are compatible. Not all are, however. If you are uncomfortable living on the "bleeding edge," then perhaps installing an OS on the weekend it ships isn't the best idea. Because, while Apple and the software vendors do their best to be ready in time, there are inevitably incompatibilities. There are literally tens of thousands of applications out there, and many of them work just fine in the hundreds of thousands of configurations that are tested pre-release. However, there are some combinations in the billions of combinations out there that do break, and you've found some. They will be resolved shortly enough.
If, perhaps, you had some more specifics, we could offer assistance. A blanket "Don't upgrade" is a crock of hooey.