Adsense Font Is TINY On My Site - Anyone Know Why?

I have a relatively new (< 6 mos) adsense site with two text blocks and one banner ad. I set the text block font size to the default (12 point?) setting to match the rest of the font on my site. Things were fine until a few days ago, when the font size suddenly shrunk. It is now noticeably smaller than the font on the rest of the page (and, of course, my CTR has gone to crap).

I had been experimenting with different looks of the ads and have "hidden" (you can't delete) a few ad blocks, but I don't believe that has anything to do with the problem.

I checked my settings on all of my ad blocks and they are still at the default (none are set to "small" settings). The weird thing is that when I look at the site on my Android phone (through the Dolphin browser) the ads look normal. However, with a desktop/laptop the fonts look all screwed up (using Mozilla)

Does anyone have any clue what is going on and how I can get my font on my text block adsense ads to look normal again?

There are some adblocks which have smaller font, make them again and replace the code.

If you go through the new adsense interface, it lets you select font size for your ads.
I would just replace the ads.

-Capp