Crin, this may not be the right place to put this, so if you need to move it or delete it, then that is fine. This is not exactly a 1.50 patch problem, but something I stumbled on that might help others with upload exchange problems.
I spent about 6 hours remodeling a house I wanted to put on the exchange. When I tried to *share* the house, I would get a message on my screen that the Upload Failed. (Therefore my house/upload never made it to the launcher, this was an Upload Failed error in game). I then chose a different house about the same size and it uploaded just fine.
I was pretty steamed over this because the house took me forever to make. I spent about 2 hours methodically deleting room after room and trying to upload the house trying to figure out exactly what caused the upload error. I knew it didn't have anything to do with size or cc, which I do not use.
My house had a balcony with the Tiki set table, dining chairs and lounge chairs. After deleting the Tiki set items I was able to upload the house. I am not sure whether it was the Tiki Table, dining chairs or lounge chairs causing the upload error, but one of these items from the Tiki set was the culprit. I did add furniture from a different set to the balcony and my house uploaded just fine.
This was a massive house with 3 floors full of store items, expansion pack and stuff pack items. Just for furture reference, someone might be able to benefit from this discovery.