Time Machine wants to start with a new, full backup instead of using the existing one

Hi, my Time Machine wants to start a new, full backup, instead of continuing with the existing one on the time Capsule.

Looking a the Troubleshooting guide, I've found the following piece of info, which is, as 99% of the times with the troubleshooting guides, totally useless to resolve my problem...

Message: Time Machine starts a new, full backup instead of a smaller incremental backup

There are three reasons why this may occur:

• You performed a full restore.
• Your Computer Name (in Sharing preferences) was changed--when this happens, Time Machine will perform a full backup on its next scheduled backup time.
• If you have had a hardware repair recently, contact the Apple Authorized Service Provider or Apple Retail Store that performed your repair. In the meantime, you can still browse and recover previous backups by right-clicking or Control-clicking the Time Machine Dock icon, and choosing "Browse Other Time Machine disks" from the contextual menu.

It should be noted (hence the uselessness of the guide) that:

-I haven't performed ANY full restore

- I havent changed my computer name

- My computer has not had ANY repair, much less a hardware repair. Neither recently, nor in the 9 months I've owned it.

Which puts me back to square one, with the marginal improvement that now I have a way of browsing my old backups.

In the event I decide to start all over again, will there be a way for me to "sew" the two backup files?

Or will I always have to go the silly way around?

Anybody has any idea?

Thank you for your time (machine/capsule, your choice;-)