The "%" symbol in equation doesn't display

[Pep Roca]

Hi,

In LyX 1.3.4, when I type an "%" symbol in an equation, the display don't show 
an "%". When I print the document, the "%" symbol is also missing. It seems 
that LyX interpret the "%" like a Tex comment, nor an "%" (in the bottom of 
the LyX windows when I type "%" appears: "Math editor mode. Type: equation 
Comment"). The code is:

        Equation: \layout Standard
        \begin_inset Formula \[ 14,5% \]
        \end_inset
        \the_end 

I attach a sample file.

 Any suggestion? It is a bug?

I use Debian testing, with kde3 or IceWM.

Thanks in advance and thanks to all the people who work on LyX.

exemple.lyx
Description: application/lyx