It's been a month since I emailed Bethesda about being stuck in the game because after completing 'Diplomatic Immunity' the next quest 'A Cornered Rat' will not activate, I explained that I had tried absolutely everything, nothing works, restarting my game was not an option since I had put way too much time into my character. They emailed back the next day (which I appreciated) saying that they were aware of the issue and it will be fixed in the next patch. That was two patches ago. Still nothing. Many other players on all platforms are having this issue. It's pretty hard to enjoy the game when you know you can't actually finish it because the quest you need to continue the main quest does not activate. I have stopped playing Skyrim this week because I have exhausted most of the side quests and I have explored most of the world. I just want to play the main quest! Bethesda, please fix this bug!
Also, I think this bug occurs if you have contact with Brynjolf before you play the 'Diplomatic Immunity' quest, which is absolutely ridiculous. Test your game more before release, or patch it when you hear of the issue! I have never heard of a main quest breaking before, I mean, side quests in a game this big, sure, but NOT EVEN RECEIVING the next quest in the main storyline??? What the hell.....