[Xastir] USB to RS-232 issue

[ka7o]

This was working great. (Fedora 14 current update - Xastir from CVS today)

PL-1203 USB to RS-232 to a KPC3+ (serial, no KISS), but I was using a 
'keyspan' adapter. Switched to a 'no-name' PL-1203 adapter and now I can 
no longer 'open' the TNC under interfaces. However, I can access the TNC 
with this no name adapter using minicom just fine.

Is it as obvious as the adapter being a POS or am I missing something else.

Have changed permissions on /dev/ttyUSB0, set the sticky bit on xastir, 
deleted the interface and created new, even started Xastir as root - no 
joy. Any ideas on what else I can try other than getting my keyspan back?

thanks!