Ok I am using DVD DL +R verbatims from singapore, and occasionally when burning DL discs, I get an error at 15% burning and it is starting to cost me lots of $$$. Here is the log from img burn, firmware is up to date, and the discs are brand new unscratched and everything, burner is only 6 months old.
I 14:04:27 ImgBurn Version 2.4.1.0 started!
I 14:04:27 Microsoft Windows Vista Ultimate Edition (6.0, Build 6001 : Service Pack 1)
I 14:04:27 Total Physical Memory: 4,191,812 KB - Available: 2,669,896 KB
I 14:04:27 Initialising SPTI...
I 14:04:27 Searching for SCSI / ATAPI devices...
I 14:04:31 Found 1 DVD±RW!
I 14:04:32 Operation Started!
I 14:04:32 Source File: C:\Users\Spank.Spank-PC\Desktop\Wii Games\Wii\Smash Brothers Brawl\brawl.dvd
I 14:04:32 Source File Sectors: 4,155,840 (MODE1/2048)
I 14:04:32 Source File Size: 8,511,160,320 bytes
I 14:04:32 Source File Volume Identifier: Super Smash Bros. Brawl
I 14:04:32 Source File File System(s): None
I 14:04:32 Destination Device: [0:0:0] PIONEERDVD-RWDVR-112D 1.24 (E:) (ATA)
I 14:04:32 Destination Media Type: DVD+R DL (Disc ID: MKM-001-00) (Speeds: 2.4x, 4x, 6x, 8x)
I 14:04:32 Destination Media Sectors: 4,173,824
I 14:04:32 Write Mode: DVD
I 14:04:32 Write Type: Incremental
I 14:04:32 Write Speed: 6x
I 14:04:32 Link Size: Auto
I 14:04:32 Test Mode: No
I 14:04:32 OPC: Yes
I 14:04:32 BURN-Proof: Enabled
I 14:05:15 Optimal L0 Data Zone Capacity: 2,084,960
I 14:05:15 Optimal L0 Data Zone Method: Copied From Original Disc
I 14:05:24 Filling Buffer... (40 MB)
I 14:05:24 Writing LeadIn...
I 14:05:25 Writing Session 1 of 1... (1 Track, LBA: 0 - 4155839)
I 14:05:25 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 4155839)
I 14:05:25 Writing Layer 0... (LBA: 0 - 2084959)
W 14:08:52 Failed to Write Sectors 659424 - 659455 - Reason: Write Error
W 14:08:52 Retrying (1 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (2 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (3 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (4 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (5 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (6 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (7 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (8 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (9 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (10 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (11 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (12 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (13 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (14 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (15 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (16 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (17 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (18 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (19 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:08:56 Retrying (20 of 20)...
W 14:08:56 Retry Failed - Reason: Invalid Address For Write
W 14:09:05 Retrying (21)...
W 14:09:05 Retry Failed - Reason: Invalid Address For Write
W 14:09:05 Retrying (22)...
W 14:09:05 Retry Failed - Reason: Invalid Address For Write
W 14:09:06 Retrying (23)...
W 14:09:06 Retry Failed - Reason: Invalid Address For Write
W 14:09:06 Retrying (24)...
W 14:09:06 Retry Failed - Reason: Invalid Address For Write
W 14:09:07 Retrying (25)...
W 14:09:07 Retry Failed - Reason: Invalid Address For Write
W 14:09:07 Retrying (26)...
W 14:09:07 Retry Failed - Reason: Invalid Address For Write
W 14:09:07 Retrying (27)...
W 14:09:07 Retry Failed - Reason: Invalid Address For Write
W 14:09:08 Retrying (28)...
W 14:09:08 Retry Failed - Reason: Invalid Address For Write
W 14:09:08 Retrying (29)...
W 14:09:08 Retry Failed - Reason: Invalid Address For Write
W 14:09:08 Retrying (30)...
W 14:09:08 Retry Failed - Reason: Invalid Address For Write
W 14:09:09 Retrying (31)...
W 14:09:09 Retry Failed - Reason: Invalid Address For Write
W 14:09:09 Retrying (32)...
W 14:09:09 Retry Failed - Reason: Invalid Address For Write
W 14:09:09 Retrying (33)...
W 14:09:09 Retry Failed - Reason: Invalid Address For Write
W 14:09:09 Retrying (34)...
W 14:09:09 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (35)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (36)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (37)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (38)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (39)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (40)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (41)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:10 Retrying (42)...
W 14:09:10 Retry Failed - Reason: Invalid Address For Write
W 14:09:11 Retrying (43)...
W 14:09:11 Retry Failed - Reason: Invalid Address For Write
W 14:09:11 Retrying (44)...
W 14:09:11 Retry Failed - Reason: Invalid Address For Write
W 14:09:11 Retrying (45)...
W 14:09:11 Retry Failed - Reason: Invalid Address For Write
W 14:09:11 Retrying (46)...
W 14:09:11 Retry Failed - Reason: Invalid Address For Write
W 14:09:11 Retrying (47)...
W 14:09:11 Retry Failed - Reason: Invalid Address For Write
W 14:09:11 Retrying (48)...
W 14:09:11 Retry Failed - Reason: Invalid Address For Write
E 14:09:16 Failed to Write Sectors 659424 - 659455 - Reason: Write Error
E 14:09:16 Next Writable Address: 658304
I 14:09:17 Synchronising Cache...
W 14:09:20 User opted to skip the 'Close Track/Session/Disc' functions.
E 14:09:20 Failed to Write Image!
I 14:09:20 Exporting Graph Data...
I 14:09:20 Graph Data File: C:\Users\Spank.Spank-PC\AppData\Roaming\ImgBurn\Graph Data Files\PIONEER_DVD-RW_DVR-112D_1.24_WEDNESDAY-MAY-14-2008_2-04_PM_MKM-001-00_6x.ibg
I 14:09:20 Export Successfully Completed!
E 14:09:20 Operation Failed! - Duration: 00:04:47
I 14:09:20 Average Write Rate: 5,734 KB/s (4.1x) - Maximum Write Rate: 8,382 KB/s (6.1x)