I don't think this has anything to do with installs or corruption. I had this same issue and a simple tweek in the profile view style solved it for me. So, select your profile view -> right click -> edit profile view style -> pick the Grid tab -> and set your grid padding (left & right) to be zero as shown in the attachment. Hope this helps.
I wish it was that simple, Nelson. My Grid Padding is at 0. I rarely pad my grids anyway. Thanks for the reply though.
Ah ha...but Nelson, you got me thinking. My Axis Offsets, left and right, were set to .5. When I changed them to 0 it appears to have fixed the issue. Big grin...
Well, I'm glad you got it sorted and here I thought I really hit the nail on the head.
Like I mentioned I had this same issue a while back (we even use the dot line type for minor grids!) but couldn't remember my exact steps for a resolution. So this morning I had C3D2011 open so I performed the steps as I suggested above (changed the grid padding) and it replicated your issue. After you said it didn't work, I tried it again in C3D2012 and nothing happened. Ha!
I'm stumped......in using someone elses template in C3D2011 with both the grid padding and axis offsets set to "1", I'm unable to replicate the issue. I can't even replicate it in 2012 now.