To double check, always open the text version of your resume and see how it looks. Make sure everything follows a logical pattern and that a reader can easily understand it. Have a friend read it as a further double check. Employers are getting more and more used to text documents as more and more resumes are submitted electronically. The old rules of writing resumes are quickly going by the wayside.
Style matters very little, content is everything.
There is another reason this is happening. More and more employers are starting to store resumes in searchable databases. To find the handful of resumes at a later date that have certain keywords in them requires that those words actually exist in the resume. Databases store resumes in text, again, formatting has no value. But whether the words that are commonly used to certain kinds of people are actually on your resume or not can make the difference between whether you get called for an interview or not.