[tex-live] datestamp in texcat

[Karl Berry]

    Ok, so texlive.tlpdb is completely rebuilt every time or just some 
    info in it is replaced on updates?

I can't answer the question as written :).

The procedure is: The catalogue info for a package is only updated when
the package's actual files are updated, ie, the svn revision of
something changes.

Put another way, we do not go out and look for catalogue updates for a
given package unless something in the package contents has changed.