copy&paste bug in 1.4.3 Win

[Bernhard Roider]

Today i tried to copy and paste a math formula in lyx 1.4.3, and some 
part of it was missing in the result. as i have not installed lyx on my 
home computer i try to remember it correctly: i think it was "x{y}^{z}". 
if you copy this (without the quotes) and paste it into any math 
environment then the y is missing in the result. i had a more 
complicated formula i wanted to copy and paste and tracked the error 
down to this.

bernhard