winamp 2.91 (which is what i use at work, not sure about 3 or 5) does snap to taskbar

Ah, I see what's happening. WinAmp and Trillian will snap to the taskbar if it's in "Always on top" mode (possibly the most annoying feature of Windows). So I'll figure out if there's an object I can call other that "Screen.height" to snap against, which returns the screen size minus the taskbar when in AOT mode.