I'm going to ask a lame question, but sometimes it's best to get those out of the way.

Are there any labels that span over the top of the text?

Do you have any subreports?
If so are properties Can Grow/Can Shrink set?

I once had an issue like this, but with a Lexmark. I ended up redoing the report and adding it to the menu specifically for them because the margins had to be set a certain way in order for it to print correctly.