User blog comment:Kirkburn/Technical Update: October 1, 2013/@comment-1997588-20131003134418/@comment-1997588-20131005173018

Ah, thank you very much for the support, both of you. The button now shows up properly, and as you can probably guess, Javascript isn't something I understand.

It was just strange it happened all of a sudden though. Nobody made any changes previously, as far as I can see.