YMMV - your mileage may vary - I realize that in moving a client to a beta, we accepted a risk of running a non-final version, so that approach isn't for everyone.
TSP - "The Script Printer"? The original solution offered was editing the registry keys having to do with Crystal Decisions, the report printing stub. That solution wouldn't stick, so I worked with AC support for several hours until we eventually just re-installed, and that seemed to take better.
I would add in passing that one comment I got in one of my support calls was that AC runs best as an administrator account and that otherwise it can be quirky. I refuse to accept that as an operational concept, and so I am hoping that was a legacy concept from some ancient past.
Bottom line, each of the versions I have installed show progress, but if you don't need specific functionality, and doing the upgrade process is large task for you, I would hold off until v6 goes gold and other folks have installed it.
I am a firm believer in the Penguin rule of upgrades - let others jump in the water first ... [and find any lurking Great Whites!]