Currently Being ModeratedFeb 9, 2013 9:37 AM (in response to POBC99)
Hello, normally that would indicate a bad or duplicate Font.
In Mail>Preferences>Fonts & Colors, what Fonts are set to use? Try changing it/them.
Open Font Boot & Validate all your Fonts & Check for Duplicates.
Currently Being ModeratedFeb 11, 2013 2:12 PM (in response to POBC99)
Thanks a lot, I did both actions:
1. Mail>Preferences> changed fonts
2. Open font Book and checked for duplicates
Most A inside square boxes disappeared in the mails, except for a few remaining.
Many thanks again