Lost attribute

Yesterday logged on with my ranger only to discover that all my expertise skills have gone. Logged back out and in, mapped to different areas, no change so logged out. Hoping for a quick fix didnt work. Anyone help me out with informing anet about this problem?

That's odd, are they minimized? (pressing the + button)

Seeing you registered on Guru in Nov 2006, I suppose you are aware of Guild Wars mechanics and thus can discern for yourself if this truly is a bug or a personal oversight.

Go ahead: http://www.guildwars.com/support/default.php

Two things to check
1. As Zodiac says, check that you've clicked the + next to Expertise in the skills list
2. If Expertise doesn't even show up in the list, do you have any attribute points assigned to Expertise? If not, do so.

Hrm... My first guess would be to ask you if you had the + by "Atrributes" ticked. To do this, press 'K' and at the top of that box directly under the 4-box image section you'll see the "Atrributes' part. Simply tick it if it's not already. It should be showing a "minus" if you have it done correctly.