How long is it locking for and how big are your drives?

I let it go all night last time.... when I checked it the next morning it'd just timed out with some errors (which I stupidly forgot to jot down) the drives are both 30 gigs... one Toshiba and one Fujitsu ( I think).

Are you leaving the drives open in read/write mode?

The last couple of days I've been very careful not to do so... and I've still been having the problem. I also had a problem recently in which it forced a database rebuild on every boot. I fixed that, but this problem has been with me for a while now.