I'm assuming that since you did the erase and restore, you don't mind if you lose your jailbreak. So, I'd recommend you put your device into DFU and then install a fresh iOS 4.3.3 on it. Here's what f4780y has written concerning putting a device into DFU:
In order to put your device into DFU mode you must press the "home" and "power" buttons together for EXACTLY 10 seconds at which point you must release "power" but continue to hold "home". After about 15 seconds, the device will enter DFU mode. There is no way to tell from the screen that this has happened as it will remain black. If you see the Apple logo you got the timing wrong. You can just try again until you get it right. It is perfectly normal for the iPad to reset at the 7 second mark. Do not be put off by this. The timing of your button release must be exactly 10 seconds. It is best not to even look at the screen as this will only put you off. You may like to try using your watch to get the timing precise.
If everything went to plan, iTunes should now recognise a device in DFU mode and prompt you to restore it. It may take a few seconds for Windows to install DFU mode drivers if this is the first time you have used it. DO NOT interrupt the process. Otherwise iTunes will never recognise the device and you'll have to do a bit of maintenance in the control panel to get things working.
Once you get the iTunes prompt to restore, select "begin as new" (or some words to that effect) and iTunes will put a brand new iOS 4.3.3 on your iPad.
If you saved your 4.2.1 SHSH blobs, and you want to put that version back on your iPad, see this sticky:
http://www.ipadforums.net/jailbreak...815-how-downgrade-your-ipad-ios-firmware.html (which is where I stole the DFU process steps from).
As a recent 4.3.3 upgrader, however, I'd say "come on in, the water's fine!" - many nice improvements here. YMMV.
Anyway, hope this helped. Good luck and let us know if you have more questions.
Marilyn