Whenever I first open the Achievements window, the top half is off the top of my screen (2560x1440). I can switch to the Guild tab, which makes a shorter window, and drag the window lower by the now-visible title bar. Once the window has been moved lower, I can switch back to the personal Achievements tab and see the whole window.

Do you have a screenshot of what you mean?

When initially opened, the Achievements window is partially off the top of the screen.

Switching to the smaller Guild tab brings it fully on screen. The bottom of the window seems to be the anchor point.

If the window is dragged a tiny bit while on the Guild tab, the top of the window seems to become the anchor point, and the window will be fully on screen when I switch back to the Achievements tab.

The position will occasionally reset to the initial off-screen location while I'm playing. One example is when I port to a new zone (took the portal from Sinfall to Oribos after taking these screenshots).

As far as I know you're the only one that has this problem at this moment. Any chance there is an addon that might cause this you can think of?

@InvisiBilldotnet, any update? Have you tried KAF without any other addons enabled?

I didn't get a chance to try it without other addons. However, I started 10.0 by purging most of my addons due to not being updated, and KAF's window now behaves as expected. If the issue returns when I re-add other addons as they get updated, it should be a lot easier to narrow down the source of the problem. For now, I'd say KAF is in the clear.

K cool, happy it is resolved for now. :)