Note sure if this is related to the disappearing issue, but I have started seeing the DF Taskbar stop responding, and my Firefox icon disappears leaving a blank space. I can switch windows with Windows+Tab but the DF Taskbar responds only occasionally.

I was downloading in Firefox and downloading (a lot of) Help Updates for VS2012 at the time.

Windows 7 Pro x64 with DF 4.10.

I reinstalled DF 4.01 and that did not help - the DF taskbar takes 10 - 15 seconds to finish starting up (draws Start button and tray, then waits for a long time, then tray vanishes and reappears correctly, then migrates task buttons) and then responds intermittently with long pauses between responses.

I experience that issue as well along with the vanishing

done.

That appeared to make the issue worse. Some of my tray icons (Process Explorer) aren't the correct image and I am occasionally getting a wait cursor on the toolbar and it doesn't respond for a while (>10 seconds) periodically.

I am no longer updated VS 2012 help or downloading in Firefox (in fact Firefox is closed) but the issue remains.

I was not having this issue with the DF 4.x betas that I noticed, but my PC has had other changes (i.e. VS 2012 RTM install, CorelDraw X6 install).

I still think something is happening on startup as well - I cycled taskbars and it took 40 seconds for the DF taskbar to finish coming up, when I start DF it takes 57 seconds for the DF taskbar to completely appear and move the icons over.

I have not had any of the issues with turning off the Application Hooks on 4.0.1.

I did notice something else with this. I RDP into my pc almost every night and every morning. On many mornings, when directly on the machine, a few apps don't respond and the icons on the lower-left are empty. Many times it is Visual Studio and/or SQL Server Management Studio that is not responding, using lots of CPU etc and usually I have to kill the process.

This morning, there was about a 20 second lag and the apps were then responding. I did not have to kill any process. I would guess that the App Hooks was causing these issues?

I tried 4.2 Beta 1 and so far the problem has not re-occurred.