Hmm, still getting unreliable results.

Sorry, but the oscilloscope readings are still just a tad over my head. I was hoping to be able to diagnose this problem with more conventional techniques (if I can).

I placed my multimeter on 2000pF, the only pF setting I have, plugged 2 wires in the built-in holes (for capacitors) and then tested from SDA pin on PIC up to SDA pin on MCP.

I get 30pF, but now I realize that the wires I'm using could very well affect the reading. The probes only test A, V, Ohms and Hz, so I can't use those.

I had used 1.5K pull-up resistors and that had helped a lot. But it still has a way to go for reliable performance. I'll do as mentionned above and lower the resistor slowly and see if things improve.

Robert