bartdesign, sorry to hear you're running into so many problems. Qwix goes through a tremendous amount of testing, and none of the testers run into what you see.
First, you can't select more than one game to delete at a a time. The list won't allow it, intentionally. If you were trying this with Qwix 1.0 and Avalaunch, then I would suspect you turned on the "Use Advanced Avalaunch features" option, which could hang after issuing the SITE REFRESH command. Qwix 1.01 removes that feature until we can get it working.
The FAQ included with Qwix discusses HDD free space. Basically you need to manage your freespace yourself with Qwix 1.01. It's not a bug exactly...I simply didn't implement a free space check because every dashboard does it differently.
Are you still seeing your machine turn into a pig with Qwix 1.01? There was a major improvment made to the memory access patterns in 1.01; it no longer freaks out the Windows memory manager. However, Windows is insane about file caching and works very hard with large files like ISOs. The next version of Qwix will have some further tuning options available that allow the Windows file cache to be bypassed completely. Initial results are quite good. There must be some drivers that are especially bad with the file cache because Qwix 1.01 allows my machine to run very smoothly with almost no memory fluctuations, and certainly no hogging.
I have no idea why your Win2000 server would be so slow. Please consult the FAQ with Qwix 1.01 for some things to check. I have no experience with Win2000 server, and have no plans to really try to tune Qwix for a server environment.
Servers sometimes are tuned in odd ways that Qwix was not designed or tested for. If you have the ability to simplify the setup to the server, please try that and see what kind of results you get.
Qwix has been tested many times with batches of up to 120GB without hangs for many users. I would suspect something else (like a full HDD). You don't say what dashboard you're running though. Avalaunch 0.48 or higher?
The average speed in Qwix is a true average. It takes the total number of bytes over the total number of seconds. The current speed, on the other hand, doesn't bother showing speeds that are below 1KB/s, so it's possible that it keeps showing a speed that is no longer accurate. Normally, those don't occur very often. There must be some other issue at play. This can be anything from a badly fragmented Xbox drive to bad/marginal sectors on the Xbox drive to network issues.
As far as anything reproducible that has been reported to me, all the bugs have been squashed. I'd love to help with what you're running into, but I simply am unable to reproduce the problems with my 2 Xboxes here on my simple network. Without more information about how to reproduce the problems I can't fix them. Unfortunately, that's the way software development works.
Glad you like Qwix (despite your issues), and if you come up with any information to help me reproduce these problems please post them here.