[OS X Emacs] Aquamacs 1.9 intermittent problems with command-C

[Tom Van Vleck]

On Oct 22, 2009, at 2:47 PM, David Reitter wrote:

> On Oct 21, 2009, at 7:49 PM, Tom Van Vleck wrote:
>>
>> highlight it... so maybe the problem is that dragging over
>> a region with the mouse sometimes highlights it but does not
>> actually delineate the region in a way that can be copied.
>
> Yes, that is possible.
> You could take a look at the function `mouse-set-region', which  
> handles that.  Look it up with C-c h f and go to its source code  
> (click on source file name).  Use the Emacs Lisp Debugger (Tools  
> menu) to instrument the function and take a look why it doesn't copy  
> the region.

Further information on this problem.
Sometimes I will drag across text, cmd-C, and paste somewhere to  
discover that the paste with cmd-V inserts old stuff.
In such a case I can cmd-C again: the data will still not copy, no  
matter how many times I try it.
But in such cases cmd-X will always work, correctly cutting the  
highlighted text.
I can then paste it back with cmd-V, and then paste it wherever else  
with another cmd-V.
The problem seems to be sensitive to some difference between cmd-C and  
cmd-V.
(reminder: it happens even when starting with no customizations.)