[Rtai] porting application to new system

[JB]

Hi, I have a real time application that I am porting from an older RTAI 
version on a fedora core 3 base system to RTAI 3.6 on fedora core 8 with 
a 2.6.23.0 kernel.

I have the real time extensions installed and have run the test 
applications successfully.  I recompiled the application I am porting 
against the newer RTAI libraries and that seemed to go fine.

As soon as the application I'm working with puts the system in hard 
realtime mode, strange things start happening.  For example, the 
ethernet port stops talking and all connections to the system are lost. 
  Keystrokes do not appear on the console very fast and when they do 
show up they get repeated a seemly random number of times even though 
the key was not held down.

I am hoping someone has either seen this kind of behavior before or 
understands enough about how RTAI is implemented that they can point me 
in the right direction to troubleshoot this problem.  Knowing or having 
an idea on where to start diagnosing this would be helpful.  Are there 
new timings or is there profiling I need to do to retune this app on 
this version of RTAI??

Thanks in advance for any help you can provide!!