text content suddenly aligned right

all the text content in my pages and posts have suddenly appeared right aligned. I can’t figure out why that has changed, literally overnight. I have never right aligned my content, yet all content now has text aligned right.

Oddly enough in Firefox, it still displays left aligned (as it should be), but in IE it is right aligned.,

anyone have any ideas why this may have happened, without me touching anything?

example can be seen at irishsongs[dot].info

Thanks