Zoom doesn't remain on exact level

Okay, this is a minor issue, but I think it should be addressed anyway.

So, I like to change my zoom level by manually typing in the zoom level in the lower-right corner (the "Z" box). I find it's faster to get to the zoom level I need, plus, if I am, for example, at 700% zoom, and need to go to 2000%, I just need to highlight the 7, and type in "20", and press enter.

Well, since getting version 1.3, I would find that a few clicks after changing the zoom level, the zoom would change by automatically applying an addition or subtraction of about 1%-4% off. It's tiny enough of a change that it doesn't really affect what I'm doing, but when I notice (usually when I need to change the zoom again), it does bug me, especially since it's no longer on the **00% value, and I would have to type in the whole value. I know that sounds a bit OCD, but this didn't happen prior to version 1.3, and it's bugging me that it is happening now.