I have this problem on and off, still haven't figured it out. I end up clearing cache/storage and repining everything I want manually.
I've had that problem before as well. it was auto-pinning everything it could and downloading it until my storage was full. cleared cache and haven't seen the problem since, but i am usually flashing a lot of ROMS so it possibly could have had to do with a specific ROM?
in other news...
I just flashed AOKP JB onto my One X and am loving it, except for one small problem. The icon layout of the stock launcher is horrendous. I mean the icon layout is 4x4 per page (not counting the dock and the persistent search bar) and it is so tightly enclosed that they could have easily spread the icons out and had 5 rows instead of 4.
Is this an AOSP problem or an AOKP/CM10 problem? I really want to run the pure stock experience but am thinking about switching back to Apex launcher.
also, stock MMS app with emoji support is awesome. (think that was custom from a dev, but found it on XDA). Not that i'm all into emoji's but when my wife texts something and I can't see it, it causes confusion.
Now she can feel free to communicate however she wants with her damn iphone. bless her heart. i'm glad she has an iphone though because i hate doing tech support for family members and friends with Android phones.