# Beamer: Vertical shading + plain frame leaves white strip at top of page

I've created my own beamer theme which uses a vertical shading for the background, but whenever I'm using a plain frame a thin white strip is left at the top of the page.

I've created a minimum working example that shows the problem even with the default beamer theme:

\documentclass[]{beamer}

\begin{document}
\frame[plain]{\titlepage}
\end{document}


Does anybody know a solution to this?

Btw, I'm using beamer version 3.0.1.

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Works fine for me with "Beamer 2010/06/21 development version 3.10". This seems to be an bug which got fixed in the current version. Note that beamer uses PGF which should also be updated.
I used to have the exact same issue until I updated beamer and PGF.