just upgraded to 2006 from 2003. went to open a part I'd made, which had been fully resolved and looking fine, and it asked to rebuild. I said sure. and suddenly theer were errors everywhere. to the point that not one solid resolved. so I took the file lent it to a friend who has been using 2006 for a while to see what he got. opened beautifully. he even saved as 2006 for me. I tried to open *that* file... same result. my machine runs W2k, and is a celeron 1.7GHz. anyone hit anything like this? thanks