I noticed this stopped working for me as well, so I did as you mentioned...
Clicking like or thank did not create any activity on the console - the last line there was already there before clicking like/thanks and nothing changed after I clicked.
FWIW Firefox 26.0 on Ubuntu 12.04
also tried iPhone4 w/ Safari, no dice.
I know I have liked/thanked posts and I have not been a member too long so change must have been fairly recent. Its possible some of them might have been from computer at work (win7, ie) which I have not tested recently, but I am sure I have thanked/liked from home/phone.
I am only an intermediate techie but if anything I can help with I'll try.