I did my 3rd year IM clerkship with residents in this program... I'm fairly certain it is not on probation (there's a chance the IM program in Reno might have been though).
http://www.acgme.org/adspublic/reports/pbProgs.asp
I'm not sure if it is officially classified as one, but the feel of the program is definitely one of a university-affiliated program. They recently opened up their first fellowship in oncology, which is partnered with the Nevada Cancer Institute.
The attendings are great and very knowledgable... although they have an interim chair and are currently searching for someone to fill the position full-time. In recent years, from what I've noticed, they have filled their spots with a large majority of international graduates (who are extrememly well-qualified and often have monster board scores). If you look on their website, their board pass rate for the past year was also 100% and their in-service scores ranked in the 87th percentile.
If you have any other questions regarding the program, PM me and I can at least try to find someone that knows the answer if I myself don't. Good luck!