That line is a little confusing, it's a little hard to get the first part.
I personally read it several time up till now on occasions and I never got that you could have have text Size 2 and text Size 1.
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"Like any of the rules, you have to apply some common sense."
Like how Photobucket scripts add a lil' something to images, making images that would normally be around ~50000 bytes end up up to 65000 bytes (as far as I've experimented), obviously higher if the signature is composed of multiple images.
Q. Were you aware of that?
I'm curious since there are lots of deleted sigs that are around that range...
This only seems to be a Photobucket phenomenon.