What if the beta testers did their jobs, found bugs, and reported them, and Bethesda didn't bother to fix them?
I know this sounds crazy, what with Bethesda's track record of patching every bug, no matter how great or small. I'm just throwing it out there as a possibility.
I know this sounds crazy, but I have to play Devil's Advocate here for a minute because I know what a pain in the ass fixing bugs actually is. Maybe they just haven't found what's causing the bugs? Some things are not simple to fix, and the things that ARE simple to fix still take a crapload of time. First they have to account for the hardware one is using, which is annoying enough with one console, much less on more than one console
and a PC release to worry about (and everyone's computers are different). Then they have to replicate the circumstances of the bug and get it to trigger again (because if it doesn't happen again or if the trigger isn't consistent there's not much of a chance at fixing it). Then they have to work on a fix, and after that they have to fix the bugs that inevitably come from the fix (because ugh change one line of code and the whole thing can get messed up...gods forbid you ever make a typo...) and this is all on a game that was worked on by a large team of people all with their own method of doing things and way of documenting what they did and how they did it (and there is always the one guy that neglects to note things down in a helpful manner. Always.). I assume that all of this is also being done while they work on other DLC/new games, because this company doesn't JUST make The Elder Scrolls.
Bugfixing really comes down to "Wave a dead chicken over it and pray". That being said, it is possible that the devs are ignoring some of the bug reports, but that sounds awfully paranoid of you guys especially considering the type of game Skyrim is to begin with.