Since the 7.3 upgrade, I've run into the same 261 error. My last backup (4/25) was fine. No other changes other than the new iTunes. Other CD/DVD writing software works. I was able to use iTunes 7.3 to burn an audio CD.
Microsoft Windows 2000 Professional Service Pack 4 (Build 2195)
iTunes 7.3.0.54
CD Driver 2.0.6.1
CD Driver DLL 2.0.6.2
LowerFilters: PxHelp20 (2.0.0.0), drvmcdb (1.0.0.1), Cdr4_2k (6.1.1.48),
UpperFilters: Cdralw2k (6.1.1.48), pwd_2k (6.1.1.48), GEARAspiWDM (2.0.6.1),
Found aspi32 running.
Current user is an administrator.
Video Display Information:
RADEON 9550
RADEON 9550 Secondary
RADEON 8500 SERIES
Connected Device Information:
Disk drive, ST3120026A, Bus Type ATA, Bus Address [0,0]
Disk drive, HP Officejet 7310 USB Device, Bus Type USB
CD-ROM Drive, PLEXTOR DVDR PX-708A, Bus Type ATA, Bus Address [0,0]
If you have multiple drives on the same IDE or SCSI bus, these drives may interfere with each other.
Some computers need an update to the ATA or IDE bus driver, or Intel chipset. If iTunes has problems recognizing CDs or hanging or crashing while importing or burning CDs, check the support site for the manufacturer of your computer or motherboard.
R: PLEXTOR DVDR PX-708A, Rev 1.12
Audio CD in drive.
Found 23 songs on CD, playing time 48:39 on Audio CD.
Track 1, start time 00:02:00
Track 2, start time 00:40:33
Track 3, start time 03:16:13
Track 4, start time 03:56:51
Track 5, start time 08:38:63
Track 6, start time 11:14:28
Track 7, start time 11:46:43
Track 8, start time 14:47:53
Track 9, start time 17:04:01
Track 10, start time 17:59:55
Track 11, start time 19:50:23
Track 12, start time 20:15:11
Track 13, start time 22:57:71
Track 14, start time 26:43:66
Track 15, start time 29:51:64
Track 16, start time 30:20:53
Track 17, start time 33:16:66
Track 18, start time 35:57:22
Track 19, start time 36:26:68
Track 20, start time 39:05:56
Track 21, start time 40:40:24
Track 22, start time 43:27:71
Track 23, start time 44:29:19
Audio CD reading succeeded.
Get drive speed succeeded.
The drive CDR speeds are: 4 8 16 32 40.
The drive CDRW speeds are: 4 8.
The drive DVDR speeds are: 4 8 16.
The drive DVDRW speeds are: 4 8 16.
Writing CD text is turned on in the preferences. If you're having problems burning CDs, try turning this preference off.
The last failed data CD or DVD burn had error code 261(0x00000105). It happened on drive R: PLEXTOR DVDR PX-708A on DVD+R media at speed 0X.
Windows 2000