top half of text missing

[spraggs]

Ive just upgraded from Mavericks to Yosemite.
No Hickups in the upgrade,
except when i run Firefox and Calendar.. the top of most text is missing.
almost as though the line spacing is too large.
I'm on a 2012 MBP, any ideas

 

[Eithanius]

So this happens only when you run Firefox AND Calendar...?

 

[umzyi]

Ive just upgraded from Mavericks to Yosemite.
No Hickups in the upgrade,
except when i run Firefox and Calendar.. the top of most text is missing.
almost as though the line spacing is too large.
I'm on a 2012 MBP, any ideas

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