I too was frustrated with Google's new text size - it was overkill, completely unnecessary. This add on works perfectly and reverts it to the minimalist, appropriately sized font that grandmas everywhere struggle to see.
(correct the description please -- it says "changes on 9th August".
I shocked yesterday when google rolled out its new super sized format. It also pissed me off there was so option for it, the super size wrecked havoc on my netbook, things didn't look right or fit right. This script solves all my problems.
when google changed i was like, "What the hell's wrong with my homepage? This look big to you?"