I have the same problem as well. Luckily i have two regulators.. The hole that people are talking about, i have heard refered to as weep hole. Also someone had the problem some years ago here:
https://www.homebrewtalk.com/newreply.php?do=newreply&noquote=1&p=2406745. After looking at your regulator pic, i have decided to disassemble mine.
The difference with my problem, was it only occurred when i moved the regulator into the fridge. (was previously outside at room temp, aprox 20*c) Perhaps it was slow leaking, but i had a very small bit in my tank so not sure.
Another thing I noticed is that if i put my finger over the bleed hole, it climbs steadily upward till i release the hole. Broken seal i would assume.
I disassembled it now and cleaned it up with steel wool and baking soda and water as it looked like corrosion over the seams. The rubber bits all looked fine to me. Not sure what kind of lube was on the end of the spring, so i tried not to whipe it off.
Unfortunately, it did not make a difference as the regulator still doesnt hold pressure after reassembly. Perhaps it needs a new gasket as the sides could have worn down over time? I have no idea where to buy one of those! but perhaps the gas store will have parts.
i will try dissasmbly again tomorrow when i have some more energy. If anyone else had any suggestions, let me know.
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