Alright, I tried a few different things the other day and still not working.
I am in a winter level, when the update came out I noticed that it had stopped snowing but the snow didn't go away. Only after I dug it up would it stay away. I journeyed to a point where new ground was being generated (and almost got lost) to try a portal and noticed that all the new territory had snow on it... but it wasn't snowing.
I'm just thinking that the fact that I'm in a winter level is whats screwing up my portals. Something with the update and biomes isn't meshing with a winter level which throws all the new things off such as the nether. Hold any water? I am not savvy with the programming or anything so I'm just pulling ideas from the air.
Actually, the only time torrenting would do anything would be if he pirated an older version; I'm pretty sure that most people are persistent, and usually that's the first thing they do after an update.
OP: are you using any mods?
One might be interfering with the portal stuff.