I understand this involves a third party plugin, so you might want to wash your hands of it, the truth is Spritefonts are pretty important, and if you have an idea what changed, it would help a lot.
Link to .capx file (required!):
Steps to reproduce:
1. Run Project
2. All Sprite Fonts have the same text
All sprite fonts, regardless of name, or instance variable, have the same text. Only impacts Firefox and Chrome (new closure version maybe?)
Each spritefont has it's own text that is unique.
Internet Explorer: no
Operating system & service pack: Windows 8.0 Latest
Construct 2 version: 133
See pictures attached.