public_common.pl looks fine
All of my other public_* files have that except for _forum_summary.pl and _forum_page.pl
however, my orinal backups don't have that in those files either. (Im using 6.05 btw). I haven't done anything to intentially modify the footer. The mods I have installed as of right now are the Whos Online 3.9qa, lastreply(2.0 i think), hypercells2.0, Dark Templars status/stars, and a little something of my own to show an extra profile field at the bottom of posts.