Dropbox gives me a "storage full or unavailable"

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http://forum.xda-developers.com – Not sure what the cause is, just got my 7 yesterday.. stock rooted, aokp, doesn't make a difference- dropbox doesn't work and just gives the error "Storage full or unavailable".. Doing a search, the only thread that mentioned it was "[ROM]| Glazed JellyBean|Version 1.1.2|Glazed Mods|Custom Animations|Speed|" and it had to do with an error in the rom, not my issue. I've tried reinstalling the app, factory reset, flashing aokp(from stock rooted)- none have had a working dropbox, but I can't find any other posts that others have had the same issue. I also have a few error 4 (HowTos)