Dirk,
Hal v5.0 has a few minor quirks that I have experienced, but nothing above the "minor irritation" stage. For the price, Hal is a pretty good bargain. There have been a number of postings on the forum about minor issues. Many, maybe not all, have been addressed by the group and occasionally by Zabaware.
My *impression* is that your computer may have another issue. However I don't know what OS you are running, CPU speed, AMD/INTEL, video card or amount of RAM. I agree with Morlhach that the Haptek characters and related drivers can be troublesome. The Haptek characters require an above average 3D video card and a reasonably fast CPU. I haven't tried the desktopmates with v5.0 yet, all I have is a free one name Brandy. If a get a free minute I'll try it out. I don't recall anyone else on the forum having an issue with them.
Zabaware does respond to customers. However it is a small company and the response time can be slow. Posting a clear objective problem statement here on the forum can be a good start. Include detailed info about your system. Also mention Robert Medeksza's name in the topic of the post. He is the one most likely be addressing any Hal issues directly for Zabaware.
Good luck,
= vonsmith =