@K-L: As I found out on my system (G5), it depends on other, parallel running or shortly closed programs, before starting Wayfarer. In some cases Wayfarer crashes or show this described behaviour. (but tis was at previous versions of Wayfarer the same).
Following programs mostly influences Wayfarer: OWB, ImageFX, Pagestream (not allways), HD-Record, and some others. All of them is one property common: they need a lot of RAM! I guess that they don't have a clean RAM-management.

My experience: Wayfarer 8.3, started on a fresh bootet system, is very stable. If you start above mentioned progs after Wayfarer has come up, it does'nt influence Wayfarer (maybe one of those progs will crash then...but not Wayfarer)