I'm not entirely sure that it's the heap management of Win 9x alone. 1.11 ran fine on my system. 1.12 bogged it down to a standstil. After reading the suggestions here I got myself memory Zipper plus (which basically does exatly the same thing as Memturbo). That made it better ... but not entirely. The system will still crunch slowly to a halt and sometimes even hang (though I'm not sure that's Xolox' problem).

When looking further into the whole mess, I found out that Xolox will take up 100% procent of my CPU-Time after a while. Not initially, but after two or three hours it will invariably be that way. Even if I push Xolox back to low priority (Mem Zipper can do that to tasks) Xolox will still eat up 80 to 90 percent of cpu-time and it will also have a severe impact on my downloadrate.

Mind you, I only have a humble PII/400, but pushing around a few TCP-Packets (and not doing anything else!) shouldn't have that kind of impact, should it?

Another thing I noticed is that, when I try to quit Xolox while it is still running, it recently will crash bigtime for me. Solution: first cut my internet connection THEN quit Xolox - works fine.

So - crossing my fingers and waiting for V1.13 ...