As the original poster, I should follow up with that the Xolox team has cleared up my issues with Xolox quiting. WHen I posted the original message, it would not run more than a few minutes without crashing. Subsequent releases have cleared up most of the problems and now I got only occasional crashes (couple times a week at most). When the option is presented, I always send the report back to Xolox (but never to Microsoft -- it won't help them with world domination, will it?)

The most pressing problem now seems to be the lack of downloads. It doesn't seem useful for the search engine to find your files if it cannot follow up with a download. I gather from other sources that this is probably not the fault of Xolox, but other Gnutella clients not playing well with others. It this point, I get about a 5% success rate on downloads. Most just never complete. While I like Xolox, it isn't particularly useful to me with this low success rate.