This may be a little far fetched, but here we go...
I'm running BBv 0.6 ere24 build, and I applied the Desire 2.1 Theme. I noticed that my signal wasn't as great as having the stock, transparent notification.
I did a restore and sure enough I got 2 bars sitting in the exact same spot that I only got 1.
Is this odd? Am I paranoid, or has this happened to someone else?