Disk Utility told me: Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.

Just before I did this repair permissions on my 7-month-old iMac, my CD drive started refusing to burn CDs. iTunes saw that there was a CD inserted and told me to go to File>burn playlist to CD. But the CD never appears on my desktop, and under File there is no option to burn, grayed-out or otherwise. I tried multiple CDs, different brands, restarts, safe mode, hardware check, etc. And it had been burning CDs fine before that. I can still download a CD and play music thru iTunes. I spent 45 minutes on the phone with tech support, who had me jump thru all kinds of hoops, but it finally stumped him. I saw in disk utility some things I've never seen before: the above Warning, and in all of the repairs there were +r, - r, --r, ++r+, +rw+, --rw, and so on - lots of them. I and tech support connected r and rw with the CD drive, but no idea what's happening. He said to take it in to the shop - it's under warranty - but I thought I'd ask if anyone has an idea what's going on. Thanks all.

Repairing permissions in Disk Utility, although often recommended for the wrong reasons, or for no reason at all, is actually a waste of time, except in the very rare case where you have a permission error. All it does is to spew confusing error messages that mean nothing, but cause the same question to be asked over and over again on this site.
Mac OS X: Disk Utility's Repair Disk Permissions messages that you can safely ignore

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