Bagginsbill, you are right - similar isn't quite the same! And maybe  I was talking a bit misunderstandable.  I referred to the very first screenshot on page 1. At a first look It looks similar, but isn't exactly the same. If it is from any help, I've attached a screenshot of the error-message, how it appeares on my rigg.

However, it is reproduceable at any time I want.
Poser 8 starts without any problem and errors, when my computer is connected with the internet. When I start Poser while being offline, the fault-message pops up right after loading and the inventory (and only that) looks completely blurry. When I click the ok-button, the message dissapeares, the inventory becomes focussed and Poser works as usual.

Have no glue of programming, so I don't know, if my experience is from any use to cure the bug. But if I can help, I'll shurely cooperate as good as I can with my limited knowledge.