You too!
I was starting to think I was the only person with a Burley Bossa Nova! I bought mine used last year and have torn it completely apart, had it powder coated and reassembled. I am having the same problem (started this weekend) and searched the forums using "suntour barcon". There appears to be a thread (fender1) with a similar question regarding the rear dérailleur, not sure it applies to our problem. Let me know if you have any luck. You might also want to post in classic and vintage.