iReport 4.7.1. doesn't display interior of fields that use Calibri font-Collection of common programming errors

When using the Calibri font the IDE doesn’t show the text associated to that field like $F{FIELD_A}, no matter how much height (or width) that field has. The IDE also crashed a couple of times when i selected all fields and i tried to select another font. I don’t know where to find the crash log file.

I wanted to post images, but I’m new to the forum and it seems I don’t have the right to.

I’d appreciate any help.