I just upgraded to mep 2011. this problem has persisted through 2010. frequently when I use the undo command

the background will change to grey. almost like when you use a 3d rotate command, or edit a block. its not the same grey

though, I went into options and adjusted the color to see if it was sending it to one of those modes. when it turns this grey,

everything runs slower. the only way I can get the background back to black, and running smoothly is to change the viewport

configuration. for example if I am using “3 right” I have to change it to another configuration. any ideas?  

thanks for your help

Sorry if nobody has answered your question yet. It's not that your description is lacking anything - in fact, it does look pretty detailed, thank you.

Our response time is usually based on a couple things:

1) The complexity of your issue - which yours seems to be pretty complex. And/or,

2) Our current workload. I can't speak for anyone else, but today has been another swamped day for me.

I can almost assure you that someone is/has been looking into your issue and hopefully you'll have a fix/suggestion soon.

Are you running any custom lisp routines?