Time machine not working since Safari 4 upgrade

I had all kinds problems installing the Safari 4 upgrade (from 4beta) a couple of days ago - it knocked out everything that talks to the internet. I finally got that sorted by reinstalling, but since then TM has been unable to complete backups. I get the following from the Time Machine Widget thingy I saw recommended on other threads:
Starting standard backup
Mounted network destination using URL: afp://Fiona%[email protected]/Time%20Capsule
Backup destination mounted at path: /Volumes/Time Capsule
Disk image /Volumes/Time Capsule/Fiona Beckman’s MacBook_001ec209416d.sparsebundle mounted at: /Volumes/Backup of Fiona Beckman’s MacBook
Backing up to: /Volumes/Backup of Fiona Beckman’s MacBook/Backups.backupdb
Event store UUIDs don't match for volume: Macintosh HD_Noni
Node requires deep traversal:/ reason:kFSEDBEventFlagMustScanSubDirs|kFSEDBEventFlagReasonEventDBUntrustable|
Node requires deep traversal:/Users/fionabeckman/Pictures/Aperture Trial Library.aplibrary reason:kFSEDBEventFlagContainsChanges|kFSEDBEventFlagMustScanSubDirs|kFSEDBEven tFlagReasonFoundInDeepTraversal|kFSEDBEventFlagReasonMissedReservation|
Node requires deep traversal:/Users/fionabeckman/Aperture Vault 1.apvault reason:kFSEDBEventFlagContainsChanges|kFSEDBEventFlagMustScanSubDirs|kFSEDBEven tFlagReasonFoundInDeepTraversal|kFSEDBEventFlagReasonMissedReservation|
No pre-backup thinning needed: 2.05 GB requested (including padding), 150.53 GB available
Unable to rebuild path cache for source item. Partial source path:
Unable to rebuild path cache for source item. Partial source path:
Unable to rebuild path cache for source item. Partial source path:
Error: (-39) SrcErr:YES Copying (null) to (null)
Error: (-48) SrcErr:NO Copying (null) to /Volumes/Backup of Fiona Beckman’s MacBook/Backups.backupdb/Fiona Beckman’s MacBook/2009-06-17-131254.inProgress/FC34264F-DFB6-41E4-B82E-A622DCC66383/Macin tosh HD_Noni/Applications/Safari.app/Contents/Resources
Stopping backup.
Error: (-8062) SrcErr:NO Copying (null) to /Volumes/Backup of Fiona Beckman’s MacBook/Backups.backupdb/Fiona Beckman’s MacBook/2009-06-17-131254.inProgress/FC34264F-DFB6-41E4-B82E-A622DCC66383/Macin tosh HD_Noni/Applications/Safari.app/Contents/Resources
Copied 58 files (54.7 MB) from volume Macintosh HD_Noni.
Copy stage failed with error:11
Backup failed with error: 11
So, I'm assuming that one of the Safari files is corrupted since the upgrade, and that's causing the problem. But how do I fix it?
Please speak slowly - I'm not a Mac whizz!!!!
Thanks for any help

Hi - I'm the original poster, but I seem to have two IDs on here. Duh!
I'm still having this problem. To be honest, I'm feeling rather anxious about messing with my TC, so today I tried running a fresh TM backup to a USB drive, thinking I would then have everything safe while I tried to resolve the problem. I was pretty surprised to get a very similar error again:
Starting standard backup
Backing up to: /Volumes/FreeagentGo_Beckman/Backups.backupdb
Ownership is disabled on the backup destination volume. Enabling.
Event store UUIDs don't match for volume: Macintosh HD_Noni
Backup content size: 114.2 GB excluded items size: 20.6 GB for volume Macintosh HD_Noni
No pre-backup thinning needed: 112.24 GB requested (including padding), 200.79 GB available
Waiting for index to be ready (909 > 0)
Unable to rebuild path cache for source item. Partial source path:
Unable to rebuild path cache for source item. Partial source path:
Unable to rebuild path cache for source item. Partial source path:
Error: (-48) SrcErr:NO Copying (null) to /Volumes/FreeagentGo_Beckman/Backups.backupdb/Fiona Beckman’s MacBook/2009-07-02-121502.inProgress/BC5683AA-D5BF-42B5-B519-58820A17300E/Macin tosh HD_Noni/Applications/Safari.app/Contents/Resources
Error: (-39) SrcErr:YES Copying (null) to (null)
Stopping backup.
Error: (-8062) SrcErr:NO Copying (null) to /Volumes/FreeagentGo_Beckman/Backups.backupdb/Fiona Beckman’s MacBook/2009-07-02-121502.inProgress/BC5683AA-D5BF-42B5-B519-58820A17300E/Macin tosh HD_Noni/Applications/Safari.app/Contents/Resources
Copied 14961 files (7.6 GB) from volume Macintosh HD_Noni.
Copy stage failed with error:11
Backup failed with error: 11
Clearly, this all stems back to the dodgy Safari installation a few weeks ago. Is a fresh installation likely to fix the problem file? Having had problems with Safari installations on two separate occasions, where it wiped out all internet communications, I am quite anxious about running another install. It's bringing me out in a sweat.... I don't recall doing anything 'unusual' to my system config, but I wonder if somewhere along the line I've changed something that caused these problems. Our other Macbook has had no problems with upgrades.
If someone could spell it out to me gently, I would be very grateful!
Thanks

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