A document to demonstrate a rendering bug. In Slideshare, you see a square; in all other pdf readers, you see a ball.

1. There is a bug in Slideshare Flash viewer
The problem: when I draw a ball with LaTeX and pgf/tikz, and look it with
any pdf reader on my work computer (Adobe Reader, Apple Preview etc.),
it looks like a ball:
But when I upload this document to Slideshare, it looks like a square (as you
can see).
In Scribd (both Flash and HTML5-based viewer),1 and in Google Docs
Viewer, the ball is shown properly.
The bug is related to making presentation slides with L TEXand Beamer.
A
The Beamer package uses similar ball to render bullets and shadow corners,
and therefore slides made with Beamer show incorrecly in Slideshare, as you
can see on slide 2 on this document:
http://www.slideshare.net/linjaaho/latex-and-slidesharefinnishfinal-7275984
I first thought that the bug is in the Beamer package, but because Scribd
and Google Docs online viewers render this correctly, the bug is probably in
Slideshare viewer.
The L TEX source code for the ball is:
A
begin{pgfpicture}{0bp}{30bp}{0bp}{0bp}
pgfdeclareradialshading[black,blue]{shadowball}{pgfpointorigin}
{color(0bp)=(black!50!blue); color(40bp)=(blue)}
newboxboxshadowball
setboxboxshadowball=hbox{pgfuseshading{shadowball}}
pgftransformshift{pgfpoint{4bp}{-3bp}}pgftext{copyboxshadowball}
end{pgfpicture}
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If I remember correctly, Scribd Flash viewer had the same bug about one year ago.
Now it works.
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