Looking forward to an update to MP, hands down the best functioning program.  After today's Everquest patch the issue is even more noticeable as they tried and fix latency issues on their side. 

Thanks for working on the problem!

The update should be in testing soon I believe.

Need to play EQ in windowed mode for it to work.

Downloaded new .exe. Rebooted both computers. Zero joy. The exact same issue remains.

I'll keep testing and rebooting to give it a thorough look and report back if things change.

Uninstall Multiplicity, REBOOT (important), then reinstall the new build.

Any change?

Very pleased to hear it and thanks for letting us know.

Sean Drohan
Stardock Support Manager

Great news that it is fixed.

Feel free to tell others how wonderful Multiplicity is

As of now the patch doesnt work for me (using steam multiplicity)

I am using multiplicity from steam too, the updates works. You need to make sure that the update is installed into your existing multiplicity folder , should be under c:/program files (x86)

The legit Steam version will be a bit longer.

If the sassteam.ini remains after the 2nd install (I cannot test at this very moment) that may work.

Sean Drohan
Stardock Support Manager

Nice !! Works like a charm! Thanks a lot Stardock !!!

Finally got it working.

On the Primary: I flushed, uninstalled, rebooted multiple times. On the Secondary: I flushed, uninstalled, rebooted multiple times. I then installed this new version on Primary and installed an older version of Multiplicity on the Secondary.

Thanks Stardock for getting us this new version. Once an official update is released, then I will update the Secondary.

I've installed the patch and for the most part it is working. 

There is one minor issue still, and that is that the mouse click is still being duplicated on the host PC. The drag duplication is gone, but the actual click remains. 

to clarify: the main issue I had with the problem was that when using mouselook to direct my character on the second PC, the character on my main PC will also look around because the mouse drag was duplicated. Now, when I use mouselook on the second PC, the main character does not move, so this is great, but once I use the right mouse button on the second computer the dropdown menu of whichever window the mouse last passed through will open on the main PC, as if I had right clicked that part of the monitors border. 

Of course, if I move all of my chat windows and spellgem windows and things away from that side of the screen the problem goes away, but it is still a little annoying. 

Again, minor issue. I'm still very appreciative that you fixed the main problem. Thank you 

Edit: posted too soon. ive now found that if I move the windows away from the border and correct the menu-opening issue, the mouse drag issue happens again. Funny enough, after further testing i found if i open a menu on the second pc and drag the mouse around it causes the main PC to look around and the second PC stays still. 

I'll uninstall, reboot, reinstall, reboot, then test again and see if that helps. 

Edit 2: Ok so I uninstalled multiplicity, then rebooted, reinstalled, then rebooted again. No change. 

I found the problem is that I use Joe Multiboxer (the latest version of what used to be called WinEQ. So it seems the patch only fixes vanilla EQ client.