[SOLVED] Image alignment messed up

Since upgrading from Ata 3.2 to 3.4.3, we've had troubles with our image alignment in posts. If we want to align an image in the center, sometimes it will align left or right and have word wrap, even if it's just one word in a narrow gutter beside the image. This is how my partner describes the problem:

Photos set to align "center" or "none" had been sitting in the midst of text on their own - with text properly above or below in separate paragraphs. Suddenly, they are being shoved to the right - poking into the right sidebar with text wrapping on the left.

Any idea why this is happening?

Here is a sample of the problem: http://www.larchmontgazette.com/poli...icting-reform/