Well I saw this and it got me a little PO'ed. So I started looking at the PGC site and legislative sites. Here is what I found the 2007-2008 PGC hand book says
A person hunting raccoons, skunks, opossums, foxes and coyotes on foot may use a handheld light. It is not lawful to have a light affixed to a firearm.
While the the Sec. 2310. Unlawful use of lights while hunting. on the PGC site states (last updated December 19, 1996) So this was the law prior to the H.B. 881
(b) Exceptions. - The provisions of subsection (a) shall not apply to:
(1) A person on foot may use an artificial light normally carried on the person to take raccoons, skunks, opossum or foxes.
(2) Any political subdivision, its employees or agents, which has a valid deer control permit issued under section 2902(c) (relating to special categories of permits).
Now the most recent amendment I have found was the copy received by the house as it was last amended on June 19, 2007 reads
(b) Exceptions.--The provisions of subsection (a) shall not apply to:
(1) (I) A person on foot [may use an artificial light normally carried on the person to take raccoons, skunks, opossum or foxes.] who uses a flashlight or spotlight held in the hand, worn on the head or mounted on the firearm to take furbearers, if the sole source of power for the flashlight or spotlight is contained within the flashlight or spotlight or on person.
(II) For the purposes of this paragraph, a flashlight or spotlight mounted on a firearm shall not include a device that projects a beam of laser light to indicate the intended point of impact for one or more projectiles discharged from the firearm.
So from what I was able to find the final amendments to H.B 881 were signed into law by Gov. Rendell on 7/3/2007. This appears to have given us a much clearer law that allows the use of gun mounted lights. The PGC site is a little slow on updating this info on their site and the hand books came out prior to the passing of this law.