AutoCAD MEP... that would have been helpful up front, as it is not the same as AutoCAD. It has a host of additional automation which may require some configuring; I recommend checking under the board for that product: http://forums.autodesk.com/t5/AutoCAD-MEP/ct-p/203
A few suggestions ...
S1) Have you downloaded and installed the latest NVidia driver for your GT 760 ?
Because 2015 is very sensitive with the graphic card driver ... And the 2014/2013/2012/etc much LESS !
For example the Quadro NVidia users have to run with the v3.33 driver which has been released in May 2014
( Even waiting for a new one ... )
If you disable the graphic hardware acceleration , have you the same problem ??
S2) Please disable the Control Cycling (Ctrl W if I remember well)
S3) Maybe run with ROLLOVERTIPS = 0 & QPMODE = 0
Of course if you have an ACAD 2015 , you have installed the SP 1 !!!
If you have ONLY an ACAD MEP 2015 , you MUST wait until the SP 1 (for AA & MEP 2015) will be released !
Today this SP 1 for AA & MEP 2015 is in Beta Test ... and will include the ACAD SP 1 ...
The update is for plain AutoCAD, where you are posting: you did not communicate your version. Verticals come later usually for patches.
Another user, using ARCH, is also having difficulties with DDEDIT's replacement in another thread: since MEP is built on ARCH, you too should probably move to the correct forum for discussions with your peers about possible fixes too.
Be sure to report this bug to Autodesk, posting here is not the best solution:
If you are a subscription user, you can report through the Subscription Center as well (as in do it twice). No one else is going to do it for you.
It looks this kind of complain is quite popular whenever new version arrives. For user's interface, I would suggest new version same as the old one as default, just give the user a choice at the beginning -' We have a new interface, would you want to try?' and the default options is 'No, thanks.'
I suggest one other improvment with new releases ...
We have new features & new commands, do you want to disable them ?
Default answer is YES !
To the OP and rkmcswain, This is my answer/suggestion:
Changing ddedit to textedit is quite a serious issue imo. I realy can't remember any function to stop working. After typing ucs 3 is still an option allthough not displayed anymore.
I hope they will bring back ddedit because it's to simply keep on working the way one used to.
@TS: I use d instead of dd for ddedit, it's less typing
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