Oh yeah! Lots! Apparently, these aren't designed to be out in the weather. Soon as I got the screws of that top part of the dome half way loosened, brown/rusty water started rolling down the sides of the dome and was soaked all inside. Fortunately, the bottom (black) compartment (where the actual camera is located) was completely dry, so the leak was only on the top portion of the housing. Since everything else seems to work when powered via 12V, I'm assuming that replacing that circuit board with the black spot should do the trick. The black spots must be on the POE connection.
There was also some black corrosion on the wires that plugged into that spot, which concerned me that maybe the wiring needed replacing too...But when testing the corroded wires with a multimeter on Ohms, was able to get a reading when touching those wires along with a pin on the ethernet input, so obviously I'm getting at least some transfer throughout those wires. Hopefully it's enough.
Unfortunately, Andy hasn't gotten back with me on a replacement circuit board. If he can send one, I'm willing to do the labor as it's just 3 screws and 3 wiring harness plug-ins and give it one more chance....Though it's been nothing but problems since day one and I'm starting to wonder if I'd be better off giving up and requesting a refund. If the thing isn't even waterproof, then what's going to stop it from doing the same thing next good rain that comes? Feels like I'm just patching and buying time.