Macbook SSD - os x invalid node structure error

Morning.

I had a rather odd error the other day crop up on my macbook.

The specs are as follows

Macbook A1181,Intel Core 2 Duo 2.0GHz, 2gb Ram, 128GB OCZ Petrol SSD

On boot up on Sunday I got nothing. The system kept rebooting. When I tryed to boot using the alt key I got the recovery partition. Entered this and it failed. I booted of the Disk and went into the Disk Utility.

Ran some tests on the HD, all OK, Ran the file repair which completed ok. Attempted to verify the disk and got teh following error.

os x invalid node structure

From here I could not do anything. Luckie for me I have been using Time Machine which backed up on the saturday night. I procceed to format the hard disk, created a partition and then retored the time machine backup.

My system is now back up and running but slightly worried about this error.

I ran diskwarrior on the disk and it appeard healthy. I also updated the firmware on the SSD.

Any other ideas?

Mike