I think this bug is somehow related to newly installed libreoffice-gtk, because there are many other issues: ex. gr. style window not working etc. etc.
Thanks again,
Domenico
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Prof. Domenico Cufalo Via Contessa Matilde 14 56123 Pisa (PI) - Italy Home: +390509662639 Mobile: +393475207746 E-Mail: cufalo@gmail.com WebSite: http://tinyurl.com/ndpoq87