Wow. It's kinda cool reading my own advice written by someone else, and still giving me the credit for it. Makes me feel all warm inside.
BILster-
You have done well, Grasshopper! Your problem might be the pump, but it could also be a crack in the fuel line between the pump and where it exits the tank. Be sure to inspect it when you swap pumps.
Coupe50h-
You are developing an internal leak somewhere in your fuel system. While not critical now, it's only going to get worse, so you might want to start looking for it.
The fuel has only three places it can leak to, internally; through a leaky injector, past the FPR, or back through the pump or it's line before exiting the tank.
To determine which, you need to build up pressure, and start blocking off the paths to each of the three possibilities. When the pressure stabilizes, that means you've found the path to the leak, and you'll know what to replace.
Take care,
~Chris