CD burner error: Burn Speed Too Fast

The easiest thing to try is to get a different brand of CD and try it. Sometimes a burner doesn't care for certain CDRs.

Just out of curiosity, can you burn from the finder?

Let me see if I can help you understand your delima.
Just because you buy a very expensive Media Brand, doesn't mean it is any good. There is such a wide range of quality in CD's and DVD's it is really hard to select what is considered to be the best.
A very good guide to use for Media in general for both CD, and DVD's is below.
http://www.digitalfaq.com/media/dvdmedia.htm
Next there are a couple of KEY points to remember when burning, these will help you.
Never have any other Applications open when burning.
I tend to use either CD-R or DVD-R Media, the reason is these 2 formats are the most widely used and recognized in all Players, and Computers alike.
Always choose the slowest speed to get a high quality burn.
This next suggestion is probably the most important.
Not all CD-R's and DVD-R's are the same
Read the packaging carefully
Many will explain that they will burn at all speeds from 1X upwards
This will help insure that your burner Software will choose the correct speed.
Don

We have an eMac and had exactly the same problem/error message. Threw away a lot of high quality Sony discs before we came up with 'a' fix (not necessarily one that works for you). Because this is our home machine, music storage was not necessarily in a logical order. We had multiple iTunes Music folders on both the eMac (where they weren't supposed to be) and on an external HD (where they were supposed to be). I consolidated them into one folder and changed the iTunes preferences so that it would look only on the external HD (which I had told it to do before but that's another story). Voila, that error message went away and we can now burn discs.

I'm guessing that ITunes was accessing multiple folders in trying to burn one playlist and that this caused this problem. Search to see if you have more than one "iTunes Music" folder.

I'm having the same problem -- "burn speed is too fast for your CD burner or media.''

I've tried everything -- new discs, slow speed, etc -- and still I get this.

I've been burning on this machine for 5 years. Could the burner be toast?

How much free space is there on the hard drive? To burn an optical disc, there needs to be at least as much free space on the hard drive as the size of the mdia being burned in order for OS X to create a temporary burn file image (about 640MB for CD-R, 4.7GB for DVD-R; allow another 1 GB free space for OS X's system caches). The size requirements are based on the media type, not the size of the files being burned, so burning 1GB to DVD-R still requires 5GB or more free space to proceed without problems.

Dumb question: how do I change the burn speed? I can't figure it out! Thanks!