Replacing subsection heading with something else

Hi,

I'm using the Warsaw theme. It places the title of the current  
subsection in the top right part of the header. I would like to  
remove the subsection title and instead use that space to put other  
arbitrary text there. What I'm currently doing is:

\newcommand{\framesummary}[1]{%
\setbeamertemplate{subsection in head/foot}{\parbox{.4\paperwidth}{#1}}}

So every time I want to put text in that place, I use

\framesummary{This is the text I want to see.}

I find this solution rather inelegant and wonder if there is a way to  
address the box where the text is placed instead of changing the  
template for the subsection.

Jochen

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