This is actually a problem within the wxWidgets library (arguably overenthusiastic error reporting) and in the default Ubuntu mailcap. Any wxWidgets program that initializes the wxWidgets MIME system will report this. From memory, it's a non-ascii character in the mailcap file.
** Changed in: xaralx (Ubuntu) Sourcepackagename: xaralx => wxwidgets2.6 -- Small warning on loading xara https://launchpad.net/bugs/77373 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs