NXtel works wonderfully when connecting to the NXtel server as expected.
However, when connecting to other Viewdata services it seems to struggle a little.
Specifically, Telstar often only shows partial pages. It appears to get worse the longer it is connected or if another service was connected to first.

Visible symptoms, in order of frequency:

• Page stops before the bottom or completely blank page
  
• End of page overwrites top of page often with $$$
  
  
• +IPD in the output on the left
  
• Freeze or crash (usually a freeze, if re-entering the service after rebooting, causes it to crash)

I can cycle through most of these states simply by pressing Enter on the index page.

ESP firmare: SDK 1.6.2.0, AT 2.2.1