2.73 rc viewport display?

Hi All, i’m new here and a few months new to Blender but learning fast… Not sure if this is an appropriate place to ask this particular question, so, please forgive me, and re-direct me if i am not properly using the forum. Ok, here we go… Has anyone experienced a sort of low resolution view port in 2.73 RC vs. 2.72b? All of my settings are the same on both versions, but, the grid lines are very jagged on 2.73RC vs. 2.72b. What am i missing?