Leading minus sign in table cell

It does not seem to be possible to enter a leading minus sign in a (MathML)
table cell. Amaya generates the follwing code if the minus sign is selected
from the Greek alphabet tablet:

       <mtd>
         <mo>¯</mo>
       </mtd>

instead of the expected:

       <mtd>
         <mo>&minus;</mo>
       </mtd>


Lars Bruzelius

SYSteam Udac AB
Box 174,
SE-751 04  Uppsala,
Sweden.

Telephone: +46 18 678054    E-mail: Lars.Bruzelius@udac.se
Telefax:   +46 18 516600    <URL:"http://www.udac.se">