Wolfgang wrote:

I've also exported that graphic as pdf but but Acrobat reader 7.0 crashes as well ( a number value is out of range).

This is a known issue that has been fixed in the Pdf exporter of Trunk (not sure about Stable), but I am still searching for an answer.. Isn't Inkscape wrong allowing users to specify miterlimits < 1?

Reading http://www.w3.org/TR/SVG11/painting.html#StrokeMiterlimitProperty "The limit on the ratio of the miter length to the 'stroke-width'. The value of <miterlimit> must be a number greater than or equal to 1. Any other value is an error (see Error processing)."