In which header are you looking, X-Try or X-Try-Ultrapeer?

What mode was that remote servent in, and how many did you try?

What mode was your servent advertising, or did it?

What type of client did you identify your node as?

Gig you verify this by trying it with other servents on your end, like LimeWire, BearShare and Phex?

Are you sure the BearShare servent you probed didn't determine that you were firewalled?

Are you sure it's not a coincidence based on too small a sample run?

Post the text of your pings, followed by the exact text of the pongs.