Problem with Module:gem-verb
There seems to be a problem with this. Look at Appendix:Proto-Germanic/reukaną: the conjugation table somehow covers a bit of the content below it. I don’t really know how this module stuff works.
Are you using Firefox? I just checked, and it seems to look fine there. This problem seems to only affect Safari and Chrome. Is there anything different about the resulting HTML from what it was with the regular template?