Does anyone experience this problem for root account?

Hello all, I have installed Suse 8.2 pro. All is working just fine. Last night, I decide to do a software update...this morning, I turn on my computer, suddenly, it no longer recognizes password for root account. Apparently, password for root account get changed somehow. What's the heck happen? At this point, it look like the only way to fix this problem is for me to re-install...unless anyone know of better solution. Thanks, LN.