My 2014 V-Lite (bought new in July 2014) was in for several small warranty items. The dealer said they had never heard of the stinky toilet problem. They tried to blame it on the way I treat the black tank (dump, black flush, then chemical pack and 2 gallons of water). They backed off when I explained this was my 4th year of RVing and I'd never had an odor problem before. They said they couldn't do anything because it wasn't leaking. When I told them about all that I had read on here, they still weren't convinced.
I came back to the forums and re-read that you just need to call Dometic with the model and serial number. I passed that on to the dealer and they called Dometic. Dometic told my dealer that my 310 wasn't part of the original problem model, but they were starting to get calls about them, too. So, they're sending a new toilet to the dealer overnight.
The dealer thanked me for solving the problem. I thank y'all for the information! I hope this info can help someone else.
2014 Flagstaff V-Lite 30WTBS
2008 Surveyor SV-234 (SOLD, but not forgotten)
2008 Nissan Titan Pro-4x crew cab