This was previously fixed in Horde_Core 2.12.  Pages with Ckeditor in 
IE11 are forced into IE10 emulation automatically.

Thanks Michael, I saw the post.  But please note that not only IE 11 
doesn't work, IE 10 and later releases of Firefox don't work correctly 
either when cut/paste is used.  The intention of the cut/paste from 
Word button is to preserve formatting to the extent possible but what 
is happening is that text is being inserted without formatting and 
somewhat as a long string with even line breaks and all formatting 
removed.

I think this is a major problem for IMP.  In a business environment, 
cut/paste from other documents is used very regularly.  The current 
IMP basically doesn't allow for this at all even when using older 
browsers.

I understand that it's not an IMP problem but when IMP uses a 3rd 
party product for such a major function as composing a message, then 
any flaw in that product reflects badly on IMP.  My users aren't going 
to say CKEditor is bad, they complain about IMP!

If there could be a choice between an advanced editor or a more simple 
editor that always worked, I would pick the simple one.  I can't see 
users composing an e-mail with all sorts of formatting when they could 
just as easily compose a document and attach that.

Perhaps this could even be a configuration preference where you can 
select the editor of choice.

I am happy to bring this up on the discussion list if you think this 
is suite for that type of setting.

Thanks.

As posted on the mailing list, turns out that even Ckeditor 4 doesn't 
support IE 11 completely/correctly.  See:

http://alfonsoml.blogspot.com/2013/08/making-imagepaste-plugin-compatible.html

This is a ckeditor 3 limitation.
This *may* be a ckeditor 3 limitation.  But need to investigate further.

If it is a CKEditor issue, you should report it to them.

I discussed this on the IMP listserve and it was indicated that this 
is a ckeditor issue but I wanted to report my findings.

When composing a message, cut/paste from other applications does not 
work at all when using IE 11.  This is both for simple text and 
cut/paste from Word using the paste from Word button.

When using older versions of IE and Latest versions of Firefox, the 
paste from Word button does not properly paste with the formatting 
preserved.  That is, if you cut a paragraph with simple formatting in 
Word, then click Paste from Word, then paste the selection into the 
popup window that appears, the selection is properly formatted as in 
the original Word document but once you click paste on the popup 
window, the pasted content will be inserted as plane text.  All 
formatting is lost including any HTML links.

Thanks