I've noticed a issue with the system clock on my DisplayFusion taskbar. Whenever you click on the clock and move your cursor within (let's say) 0.2secs on Steams tray icon or the two system icons (network status + volume) it'll open their ContextMenu or ContextWindow.

I'm pretty sure this issue exists on any system tray icon which provides a single left-click action (like showing some window or contextmenu).

I recorded a small video showing the issue. There is a small timespan where I leave the mouse above the volume icon and it'll open the window as well - unfortunately it opened on my main screen and I couldn't move it (within the recording area).

http://blackcorestudios.de/DisplayFusion/DisplayFusion%20System%20Tray%20Issue.html

[EDiT]
Oh, I just tested one more thing: It's not just related to the system clock: You can also do it by clicking on both system tray icons (volume + network status) and leave the mouse again on Steam (or on <insert any other application which provides a single left-click action on it's tray icon>).

Confirmed om mine too, interesting little bug.

Im on Windows 7, 64bit, latest updates, latest DF.