Prevent linebreak in quotations

Hi everybody,

I have a little problems with jurabib respectively LaTeX breaking the lines in quotations. I 
have my references set up with   

\renewcommand*{\bibpldelim}{(}
\renewcommand*{\bibprdelim}{)}
\renewcommand*{\jbpagesep}{:}

So I get references like (Smith 1997: 1). Sometimes, LaTeX will break this at the end of line 
right after the :, leaving the page number alone on the next line. This is really ugly IMO. Is it 
possible to define the space between \jbpagesep and \bibpredilm as ~?

Or any other suggestions?

TIA

simon





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