When I bump the disconnect joint between the fuel rail and the line (rear of engine - I think this is the supply side) it squirts gas out. Is this normal? It does not seem safe. It appears that the fuel pressure is sealing the joint, but if you depress the elbow then it leaks.

Not safe at all. That'* a fire waiting to happen. There'* a rubber O ring in there. Pick up a new one and replace it.

Thank you - how do I disconnect this joint? Is it "press and turn" type of connection or is a tool required?

You will need a tool for that, you can pick them up at autozone real cheep.

Danthurs - many thanks - that worked out well. The supply connection has 2 Orings in there (brown and yellow). The brown one came apart in my fingers. I used dental picks (Harbor freight) to fish the old one out and poke the new ones back in. The dealership couldn't sell me an Oring - wanted to sell me the whole 8ft supply line. I picked up a pack of Orings at Autozone and used the 8mm ID x 12 mm OD x 2mm W ring - it was closest. No leaks when I wiggle it now.

You must use fuel rated o-rings or the fuel and additives may eat those rings.

Oh .... bummer. Any good sources for those? My dealership here wants to sell me half a car every time I talk to them, or they can't even find the part number. Makes me wonder how they do repairs.

http://www.marcorubber.com/viton.htm

Check Amazon, Napa or Advance auto parts.

Or allorings.com
http://www.allorings.com/

Do the o rings fall out when you open the rails? I am asking because I took apart the rails and never noticed the rings and then reassembled (on the S10, not Bonny). I did go back with the ignition on and put my hand on the rails and did not see or smell fuel, but I did press the purge valve and fuel came out.

No, they don't fall out. And when applying pressure on the connectors, it'* very common for them to leak some fuel. Think about deforming an o-ring that is formed to something for a few years, by applying pressure in a manner that'* not expected. It'* going to leak a little. However a set of new o-rings usually seals a lot better and is safer.