Comment 2 for bug 1246015

Please provide information about your OS/platform and inkscape version (see Inkscape menu 'Help > About Inkscape'. If you installed a development snapshot build (e.g. from the PPA) which does not include the revision number, please check the package name (via package manager or the name of the downloaded 7z archive).

Does it happen in certain files only, or in a new document with a couple of simple shapes as well?