i've tested with 1.5.3 and 1.5.2.. now that you've mentioned it, i tested with 1.1.4 and it crashes too
this happens only with a custom about:blank from usercontent.css not with default about:blank.. with normal about:blank a print preview opens normally.. i noticed something when trying to use print preview with chrome addresses like an xul extension like gspace which km shouldn't be able to preview, an error message popped like this one
i think with custom pages from css where km isn't able to print preview, a similar error message should pop instead of a crash
very silly bug i know..
but maybe it can help identify other real bugs.. it all started when
frank asked for better print preview and i was testing to see differences between print preview in km and other browsers and at one point i previewed the about:blank and the crash happened.. so i blame frank for this bug