Invalid Backward link error message--How can I fix this?

[bellabuttercup]

Please help. My mac mini crashed today. I was trying to burn a cd and it froze up causing me to need to turn it off manually. When I tried to reboot I got the following error message and I can't get past it. Does anyone know how I can fix this?

hfs_swap_BTNode: Invalid backward link (0x000066BA)
node=79 fileID=4 volume=Macintosh HD device=root device
hfs_swap_BTNode: Invalid backward link (0x000066BA)
node=79 fileID=4 volume=Macintosh HD device=root device
/etc/mast.passwd: Input/output error
hfs_swap_BTNode: Invalid backward link (0x000066BA)
node=79 fileID=4 volume=Macintosh HD device=root device
-sh:/etc/profile: Input/output error
hfs_swap_BTNode: Invalid backward link (0x000066BA)
node=79 fileID=4 volume=Macintosh HD device=root device
-sh-2.05b#


I wrote this down and recopied it on my other computer. So if it seems off it might be, but that looks like the message I received. Help Please

[destroyboredom]

I tried googling it to see if it came up with anything, but nothing. Not sure what to tell you. I would give Apple a call.