I had an adsense account, changed my password, then it started telling me I didn't have an account! Changed my password back, and account is back again. So just a tip, don't change your google account password if you have adsense, it loses your account! Oh and is $100 a month incoming good for a single site with adsense?
What Rubbish.. I changed my password over 100 times and never faced this problem. May be it was a temporary glitch from Google.
I also have changed my password successfully on multiple occasions - and I'm sure many thousands of people change their passwords every day.
Must be just me then, but as soon as I'd changed it back, it started working again, otherwise no matter how many different browsers I'd tried, it wouldn't let me view my adsense account.