User Registration and Notification issues

Hey all :)

A client is having an issue. I can't say exactly *when* the issue started because she's one of those that sees a problem, tries to fix it (which means I have to go back in and fix a BUNCH of stuff she "fixed"), and then forgets to tell me until months later.

We have several Gravity Forms on the site, and all are working fine - she gets all the notifications when someone does whatever with a form.

BUT... we have one form that is used for membership. It's using the user Registration and Paypal modules together with a custom form to collect data for a directory. When we set Paypal to only create a user and send a notification after successful payment, it's not happening anymore. (but if we uncheck those boxes, the user is created and the admin is notified - but they'd rather not do that because they don't want a user to be created until AFTER the payment has been successfully made).

We suspect something's happening between Paypal and the site, but it's REALLY odd, because she finds out someone has registered for the site because Paypal notifies her she's gotten a payment. So the payments are being processed just fine through the form, and the info is being saved in the back end of the site as an "Entry" to the form. But notifications from the form are not sent, and the user is not created for some reason. Payment is processed fine, and the end user is returned to the site like they should be (as a successful transaction), but the notification isn't sent and the user is not created.

Anyone know what may be going on here? Any insight would be appreciated.

Yeah, we've tried that. Thing is, either way (SMTP or no) the form has the issue. They've even contacted the host to see if they have any kind of logs or anything that might tell what's going on (I'm waiting to hear back).

We have 5 other forms on the site (with the exact same notification settings), and all work just fine. The one that integrates with Paypal is the only one that doesn't. it's really strange, but because of this, we can only (through testing) figure *something* has gone wrong somewhere between the time the end user successfully pays and the information returning back to the site. It's like Paypal drops off instead of notifying the site that the transaction was successful, which is what should trigger the creation of the user/sending of the notification to the admin.

And I'll check again for theme conflicts (I wrote the theme, and this was brought to my attention a few days ago *because* they wanted me to upgrade the theme - they hadn't updated WP from 3.4.x yet) but I'm pretty sure I got them all.

I'll give that a shot. I know earlier in the project (several months ago) they were having issues with that, but they were supposedly resolved back at the end of summer. I'll check it again. Thanks!

@Shelly, did you resolve this as I have exactly the same problem and cannot see any problems with the setup. i am getting a response code of 200 at Paypal with the money going thru ok but gravity forms is stuck in 'processing'. Sound familiar?

Are there any negative ramifications to trying to roll back to the previous PayPal add-on where things were working?

I have rolled back to 1.5. Hopefully, I'll know shortly if this resolves the problem.

There was definitely a change somewhere. The 10 transactions since reverting have all worked perfectly, as they did before.

Let me know what I could send you to help track it down. I could export the form, maybe even dump the Gravity Forms tables with data, if that would help. We're running WordPress 3.5.1. The only plugin we're running that might cause issues is DB Cache Reloaded, but you'd think if that were the problem it would also affect 1.5 in addition to 1.6.