pass mouse over black (in your case) block as is copying text
then press ctrl-v while cursor in editbox
" test" appears (no " )
What your reporting is the fact that highlighting now inverts the forground and background colors to a new color, and becuase both background and forground have the same color, its inverted to a different but soild block of color.
This has been reported alot already, some repair or fix MAY come in the next version.