TDE 3.5.13.2 Wheezy amd64

I reply to an email, I use 'smart quoting'
Actually editing new emails same issue.

Highlighting text to be deleted does not work reliably... the 
hightlighted text  does not stay hightlighted. It takes a few tries to 
get the text to stay highlighted so I can delete it, very annoying.

Anyone else see this behavior?

-- 
Peace,

Greg