My 9300 can connect to appword through browser plugin and can download/sync a software, but after one download/sync it will always start to get error & unable to download another app.
The errors are mostly straight 'web plugin error' and 'problem synching with appworld' when trying to download/sync.
The temporal fix that works for me is to turn off all network and do a battery pull. After that I have no problem downloading app but only for once. Then the cycle begins again.
I only need Advance OS and Led for its Led and Restart functionality so I don't really mind with the cycle, which I rarely do. Still, I guess BB experience suppose to be smoother than this. It is funny to find that I have smoother experience with $25 Nokia than $150+ Blackberry xD
P.s. I already have unlimited internet landline before I own my 9300 so buying bb full service data plan doesn't make sense for me.
