"Chuck Dreier" wrote in
nk.net:

I just returned on a flight from San Juan to Orlando and our flight
level was 300, including a portion over the mainland. Since then I've
been listening to my aircraft radio and routinely hear flights
assigned FL320, 340, etc.. It was always 2000 feet separation with
levels 290, 310, 330, 350, 370, etc. What has changed, and when did
it change? Thanks!

What has changes is RVSM (Reduced Vertical Separation Minimums). Rules
went into effect just a few weeks ago (if I recall correctly). Aircraft
not in compliance with the new rules are restricted to something like FL290
and below.

jmk