Hi, I have filed the following bug in the SF tracker. In format_paragraph the following code appears: string::const_iterator line_begin = par.begin(); <snip> string::const_iterator last_space = find(reverse_iteratorstring::const_iterator(line_end - 1), reverse_iteratorstring::const_iterator(line_begin - 1), ' ') .base(); This generates a run-time assertion if compiled with VC8 and debug/checked iterators. /Peter