I think a number of people are throwing out that rumor, as the Packers seem to be giving Jenkins every chance to take Taylor's job... and it's a move that would save cap space... that being said, I'm not sure I'm buying it, as the loser of the Taylor/Jenkins battle could be the 6th man up no matter which starter gets injured, and you like talented depth.
If Linsley gets injured, then Jenkins goes back to Center (where he played in college), and Taylor is back at LG.
If one of the OGs gets injured then natural they're the next back-up.
If Bulaga gets injured, then Turner might be asked to slide out to RT (because he might be better than the back-up OT) and then Taylor and Jenkins are both starting.
If Bak gets injured, well... then... we're kinda screwed. But probably Light goes in, because that's been where he has been practicing more at, especially since they released Spriggs.