Hi, if I'm right, there's an error concerning \parbox's optional `position' argument, here:
┌──── │ http://svn.gna.org/viewcvs/*checkout*/latexrefman/trunk/latex2e.html#g_t_005cparbox └──── Indeed, it is said: ┌──── │ The optional position argument allows you to align either the top or │ bottom line in the parbox with the baseline of the surrounding text │ (default is top). └──── but, according to ltboxes.dtx line 135 (2015/01/08 v1.1h), default is `c'. Moreover, center alignment should be mentioned. All the best. -- Denis