[Building Sakai] problems with "show feedback" and "feedback immediate" on character ª or º

[Raul Sanchez Vegas]

Hi all

If we have a test configurated with "feedback inmediate" and it has a 
fill in blank question whose correct answer contains the character ª or 
º, when student, during assessment, selects "show feedback" it always 
shows the wrong feedback despite of being correct.

Has anyone had the same problem?

Regards,
Raúl