Why do BarChart graphics exported from Mathematica have pixelated text? Is there a workaround?

Question

I\'ve been showing off my fancy new graph formats to colleagues, but we have discovered that graphics based on BarChart have jagged text when exported as EMF, W

Answer 1

What version of Mma are you using?

In v8:

a =  BarChart[{1, 2, 3}]
Export["c:\\test.pdf", a]

And zooming into the pdf: