MacOS – The “Open” and “Save” system dialogs get taller every time I open them

I'm using Mac OS 10.10.2, and I believe this problem only occurs with Mac OS X Yosemite.

Here is the dialog box I am talking about:

I just pressed Cmd+S on Ask Different to trigger this dialog.

If I were to close this dialog, and press Cmd+S again, this dialog will grow taller, by about 100 pixels, I'd say.

What is causing this? This actually is really annoying, as I find myself opening this dialog upwards of 30-40 times a normal work day, causing the dialog to frequently go off the screen, causing inconvenience in saving the files and similar operations.

Is there a way to fix this? I'm not really looking for a fix – I just want this bug to be recorded here, in the event of there being a fix in Mac OS X in the future (only after I upgraded to Yosemite, this started happening).