Why is the text blurry in LibreOffice Calc Macbook Pro Mavericks

The text in every cell looks blurry, but when I double click a cell the text looks sharp while I edit it.
The text is also sharp in the edit field above the spreadsheet.

Anyone know how to fix this blurriness?

Unfortunately this is a known issue. Text rendering on OS X is still very buggy and looks unpleasant.