I've got Open Transport 1.1.1b7 on my computer. It seems a little more stable than 1.1. I don't get as many type 11 errors anymore, now the line just drops. The line usually drops when a program such as Netscape or Anarchie accesses the disk for a few seconds when I'm downloading something. This is very annoying. Netscape will access the disk too much by simply saving graphics to cache. As long as I don't do anything disk intensive, I stay connected.
I've switched to Internet Explorer because it has a better caching scheme. Thus causes less unexpected line drops. Version 2.1 is actually useable in my opinion, but it is still a little slower than Netscape. It does put pages in cache very fast though. One interesting note is that the entire Internet Explorer fits on a 1.44 floppy disk when compressed.
