Odd cause of fret buzz.

[goingdownslow]

Recently I put new strings on my EB3 and last night, after not having played it for a while, noticed I was getting a fret buzz on the G string for quite a way up the neck. Raising the saddle, even to higher than the D string, was not curing it so I thought it must be something else.
I noticed it buzzed only when the string was plucked with my index finger and was ok with my middle finger. I was making sure I was plucking evenly with each.
The conclusion I eventually reached was that although I try to keep my nails short the index fingernail was clicking the string, as after filing it down the fret buzz had gone.
How that works I don't know.

Edited March 3, 2017 by goingdownslow