As far as Ovi is concerned, the CSSU is the same as PR1.3. You should be worried if your version number ends in -2.002, as opposed to -2. What is the exact output from Settings > About product? I'm only talking about the first 3 lines of bold text.

If that does in fact look exactly the same as the number for PR1.3 on the firmware page (you might need to enter you IMEI number), then try this...

1. Remove Hide UA by purging dpkg.
2. Open any web page, google say, and in non-full-screen mode tap the bar at the top then select Options > Clear private data. You can't do it from the bookmark screen.
3. Go to store dot ovi dot com.
4. Report back on these things:

What happens?
What browser are you using?
What exactly is the error message?