Abductor II Delay - L7805 is adding Voltage to ground!

[cjonesplay]

I've never done this before and I've made and troubleshot dozens of pedals, but it's gotten to the point where I could use a sanity check on this one. Anyone wanna help?

Abductor II delay

Problem:  I've got 0 volts on the ground -until- I plug in the 78L05. As soon as I do this the ground is increased to 3 millivolts. As a result, the delay is coming through but the repeats are distorted (I believe this is related). I've checked all my component values and placements and switched out the diodes, 78L05 (did the same thing with 10 different ones), chips, and checked the cuts, wiring and solder joints about 10x with no luck. Here's the things that I've noticed which might help:

1. The output of the 78L05 is 4.99 volts and is reading on pin 1 of the PT2399's.

2. The added voltage to ground is 3mv on the ground of the 78L05, and then immediately drops in voltage as it leaves that part of the circuit. The strange thing is that pins 3/4 of both PT2399's #1 and #3 (the top 2 chips) are reading consistenly higher at 3.3mv, while the bottom chips/same pins read lower at 1.6!

3. If I just plug in the In and Out of the 78L05 I get .9mv added to the ground

4. I've made one modification:  instead of the volume knob I've wired an additional 100k resistor in series to the output in order to balance the effect at unity. This shouldn't be an issue, but just thought I'd mention this in case.

I am happy to include a couple of shots of the board if anyone thinks it will help. Anyone wanna help a poor sap from losing his mind?