Widget display problem

[PEZ08]

I have a problem with the displaying of some widgets.
Look at the calendar widget in the picture.
I tried to delete the preferences, doesn't work.

Someone knows how to correct this problem?
thanks

 

[kostia]

The active version of the Helvetica font is not the default Apple system font. You've removed Helvetica.dfont from /Library/Fonts, and/or you have another version of Helvetica open (like in Suitcase or another font management program). The widgets are designed to use Helvetica.dfont, and you need to keep that one active. Some other versions of Helvetica may conflict with it, but it's usually manageable.