I deleted my Timecapsule and did a full new backup. I followed the steps to delete the backup plist file. Everything worked fine for 2 days. Then again a 35GB backup again. This drives me nuts as it is not happening when i do parallel backups to an external HD via USB.
11.12.12 12:06:45,998 com.apple.backupd[18389]: Starting automatic backup
11.12.12 12:06:49,175 com.apple.backupd[18389]: Attempting to mount network destination URL: afp://David%20xxx;AUTH=SRP@David-xxx-Time-Capsule.local/Data
11.12.12 12:06:58,103 com.apple.backupd[18389]: Mounted network destination at mount point: /Volumes/Data using URL: afp://David%20xxx;AUTH=SRP@David-xxx-Time-Capsule.local/Data
11.12.12 12:07:47,031 com.apple.backupd[18389]: Disk image /Volumes/Data/David xxx MacBook Pro.sparsebundle mounted at: /Volumes/Time Machine Backups
11.12.12 12:07:47,035 com.apple.backupd[18389]: Backing up to: /Volumes/Time Machine Backups/Backups.backupdb
11.12.12 12:08:00,280 com.apple.backupd[18389]: Using file event preflight for Macintosh HD
11.12.12 12:08:01,690 com.apple.backupd[18389]: Will copy (60.6 MB) from Macintosh HD
11.12.12 12:08:01,696 com.apple.backupd[18389]: Found 135 files (60.6 MB) needing backup
11.12.12 12:08:01,705 com.apple.backupd[18389]: 2.22 GB required (including padding), 1.5 TB available
11.12.12 13:08:00,190 com.apple.backupd[18389]: Copied 19.21 GB of 19.21 GB, 277398 of 277398 items
11.12.12 14:08:00,755 com.apple.backupd[18389]: Copied 29.28 GB of 29.28 GB, 470803 of 470803 items
11.12.12 15:00:31,064 com.apple.backupd[18389]: Copied 715064 files (34 GB) from volume Macintosh HD.
11.12.12 15:00:32,071 com.apple.backupd[18389]: Using file event preflight for Macintosh HD
11.12.12 15:00:33,499 com.apple.backupd[18389]: Will copy (16 MB) from Macintosh HD
11.12.12 15:00:33,506 com.apple.backupd[18389]: Found 114 files (16 MB) needing backup
11.12.12 15:00:33,508 com.apple.backupd[18389]: 2.62 GB required (including padding), 1.47 TB available
11.12.12 15:01:18,452 com.apple.backupd[18389]: Copied 3231 files (16.2 MB) from volume Macintosh HD.
11.12.12 15:01:20,293 com.apple.backupd[18389]: Created new backup: 2012-12-11-150118
11.12.12 15:01:28,938 com.apple.backupd[18389]: Starting post-backup thinning
11.12.12 15:01:42,750 com.apple.backupd[18389]: Deleted /Volumes/Time Machine Backups/Backups.backupdb/David xxx MacBook Pro/2012-12-10-115649 (15.4 MB)
11.12.12 15:01:42,751 com.apple.backupd[18389]: Post-back up thinning complete: 1 expired backups removed
11.12.12 15:01:43,289 com.apple.backupd[18389]: Backup completed successfully.
11.12.12 15:01:46,292 com.apple.backupd[18389]: Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb
11.12.12 15:02:51,305 com.apple.backupd[18389]: Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb
11.12.12 15:04:14,035 com.apple.backupd[18389]: Ejected Time Machine disk image: /Volumes/Data/David xxx MacBook Pro.sparsebundle
11.12.12 15:04:14,461 com.apple.backupd[18389]: Ejected Time Machine network volume.