Question About Disc Recognition After Errors

hey folks,

I ran into such an odd scenario that I find I'm forced to ask...

So I was ripping my library of DVDs in and while shifting the stacks of discs in and out in the semi-dark while playing a game, I inadvertently left in a DVD when i dropped another DVD on top of it and closed the tray. needless to say after a few seconds it started making quite the racket. I opened it up and took them out. neither disc was harmed.

Only that's when something odd happened. My drive would not recognize any other discs after that. And the second DVD drive (identical model) also would not recognize any DVDs. I thought it was weird and figured a reboot would reset any flags thrown by having the 2 discs caused a rukus.

Rebooting did not help. So I started poking around. The drive will recognize CDs, both music and data. it will recognize data DVDs, but any time you put in a video DVD it chokes and says to insert a disk into the drive and kicks the drive open. I cannot even see video DVDs as data via explorer. It's just so odd.

I put in a DVD burned by the drive a few weks ago and guess what, it sees them just fine. But put in any standard DVD videos you picked up at the store and poof, it kicks them back out saying "Please Insert a disc into drive X:"

Since it's both drives, it's narrowed down to a config issue of some type, not a hardware issue with teh drive that had 2 discs in it at once.

I tried deleting both devices and letting them be re-detected, no joy.

Any thoughts on where to start looking into this? Running Vista, SP1

RECAP
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Two identical drives started exhibiting the problem at the same time
During a session ripping DVDs, stopped working after accidentally putting 2 disc in one drive
Both drives can still read and work with CD, data DVDs and previously burnt DVD-R and DVD+RW
neither drive can read/recognize store bought DVDs
Already tried removing devices and redetecting
Already tried running Starforce remover just to be safe in case it came with a game I was playing

Open to any Suggestions

UPDATE
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Removed one DVD drive and hooked up one from another system in the same socket, same connectors, and it works fine.

What could have happened that effects only the drives themselves and effected both at once?