E:Can't open /cache/recovery/command

I just rooted my Sprint HTC Hero via instructions from theunlockr.com and everything seemed fine until I powered on my phone while holding down the home key.

At first I got a graphic of a sign with an orange exclamation point. I tried home and power again and it took me to the Andoid system recovery utility and gave me three options

reboot system now
apply sdcard:update.zip
wipe data/factory reset

Then at the bottom of the screen in yellow it says "E:Can't open /cache/recovery/command

If i reboot the phone, it seems to work fine and I still have root access.

Does anybody know if this is something that needs to be fixed.

Sorry if this has been answered before, but I did try searching the forums before posting.

Any advice would be appreciated.