After downloading lion does not recognize blank discs or dvd´s cannot burn anything

I downloaded Lion and now my mac does not recognize any blank cd or dvd and I cannot burn anything, not with Toast 10, or with iDvd still not recognized. Can someone help me??

Hello
I have been trying to fix a similar issue on my wife's PowerBookG4. I cannot pin point when it started, but she noticed it a couple weeks ago when she tried burning a disc. We have come to discover that her drive will no longer mount any discs at all (blank or otherwise burned discs or software). If I had to make a guess it had to have started in the last month or so after some recent update. Maybe 10.5.2? I am not sure.
I am getting extremely frustrated with Apple though on this matter because I have been browsing multiple forums and seeing this exact issue over and over again and nobody seems to have a solution or correct diagnostic for it.
I have tried zapping PRAM, I have tried many types of discs, brands, etc. and nothing works. I know this is a Software issue, it has to be. There are a LOT of people reporting this issue. If necessary I will start linking to all the different posts that I found in the last few days.
Please post some help, ASAP. This has been a major inconvenience and I cannot believe that Apple hasn't discovered the problem with how many people have been reporting it.
Thanks

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Hi
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When inserting a blank disc (various forms of media including DVD's and CD's) and selecting the Finder to open mount the disc on the desktop, the Finder fails to mount or load the disc with an error (no error number) indicating that the disc is not recognized.
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Hi papagenu, and a warm welcome to the forums!
What brand & Model is it?
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After downloading lion does not recognize blank discs or dvd´s cannot burn anything

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