That's where the last commit date goes (if you have Subversion and if
svn.exe is in
PATH).
If Subversion is found,
autorevision will use it to cleanly determine the revision number and last commit time, otherwise it will hack the revision number from the
entries file.
Since the nightly builds have empty parentheses, this proves that Lieven doesn't have
svn.exe in
PATH on his machine. That's fine, it just does not show the commit time
No other implications, no problem with that.