Any time that you attempt to use any Beta, There is the possibility of it being Really Buggie. As a matter of fact I personally think several of the Latest Stable Versions are also very Buggie. The only thing to do, is go way back for some of the Best Versions of LW. Here are a few suggestions.
OldVersion - Newer isn't always better ! Version 4.12.3 or 4.12.6 are probably the most stable versions without the useless Bittorrent attempt. Hope this Helps.
If you decide to stay with the Buggie versions, then you may just have to deal with a lot of Problems.