The mappero problem got solved miraculously. I clicked go to button->nearest POI. Then.. whoa! everything is back to normal! Maps started downloading, old maps started showing up along with all POI, tracks etc. Very happy.

OVI still doesn't show anything though. zeebra, my problem is different from yours. In my case ovi doesn't show anything at all. Not that I am much worried about it, I got mappero back. Still I hope you get a solution.

Thanks all who took their precious time to reply. Also thanks to mappero developer.