Package Management oddity

[SunnysideUK]

Several times now I have been presented with an installed package list with a red ! - Package not in repository.
After an update check all list OK again. There does not seem to be any functional problems I've noticed, just this oddity.
Any ideas what's its cause and remedy?
Note. I have already ran a fixdisk.

and after update check...

 

[prpr]

Post the output of ls -l /mod/var/opkg/ from the command prompt next time it isn't working.