I upgraded to Mavericks last week. I have a secondary monitor, and I use Spaces. Since the upgrade, I have a frequent problem where windows will get stuck partially exposed in the top left corner of the screen, under the finder bar. I can drag it to the right, but it automatically snaps back into the upper left.
The close, minimize, and zoom buttons are all off-screen. If the window is on my right monitor (which is the main display), the missing corner doesn't show up on my left monitor.
If I zoom (maximize) the window using a keyboard shortcut or the Window menu in the Finder bar, the window simply disappears off of my screen, seeming to slide upward, even though I have no spaces or displays "above" the one I'm working in.
If I go to Mission Control (Ctrl + Up), then the window appears there as partially out of the space.
This has happened to three separate applications so far (Chrome, Outlook, and Remote Desktop), so I'm pretty sure it's not application-specific.
If I quit the application (sometimes I have to force quit), the problem goes away, but it keeps happening. It seems to occur when I switch to the application after working in another.