AT&T came through and added the PTR records. The two /24 IP blocks that my phone's IPs come from all resolve to host names now. But unfortunately that wasn't the problem. What was, and is the problem is the fact that the only APN available to my phone through its current provider goes through a proxy. So the public IPs that it's given by the dhcp server are in fact proxy IPs. Which, of course, means that my phone being detected by PA as using proxy connections is accurate. I believe there are some comments about mobile carriers using proxy IPs earlier in this thread.

Question: Does the IP Whitelist provision in PApro allow the use of CIDR or wildcards? I'm hoping I don't have to individually allow each IP.

This is exactly the problem! The system falsely detects certain mobile carrier proxy IPs as Tor exit nodes. Therefore, you can't turn off these false detections without turning off Tor detection altogether. Personally, I could get by if there were a way to whitelist IP ranges. But it appears that there isn't. It's really a shame because this system has tremendous potential. But as it stands, auto blocking the registration efforts of legitimate potential members stands to discourage them from ever trying to register again. This problem really needs to be worked out in order to make this an outstandingly useful and dependable add-on.

It also seems difficult to get the developer to address these concerns for some reason :(

im getting an error:

From the error you posted, it looks like perhaps the files were not all uploaded to your server. (the includes sub folder, etc)

Double check that, perhaps?

When i first read your comment i thought "how stupid does this guy think i am"...

I re-uploaded all the files and the modification works :| Thanks.

The developer should click the "Additional Files" option then, to make it more clear that files need to be uploaded to the server. :)

I know I know... egg on my face. (shamed)