Hi all,

I recently upgraded to R-3.1.0 from R-3.0.2. Things seem to be fine, but
when trying to plot a ggplot image with transparency, I get the following
issue:

Warning message:
In grid.Call.graphics(L_polygon, x$x, x$y, index) :
  semi-transparency is not supported on this device: reported only once per
page

This only appears to affect my R-3.1.0 installation and not my R-3.0.2 as I
can still plot normally with it. Has anyone else experienced this problem?

Thanks,

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