thanks. Keep up the good work.

I ran using the blender-softwaregl and the problem did not occur.

Found something! If I turn on "smooth" under shading the problem doesn't happen. If I switch it back to "flat" it comes back! With Flat selected, I tested turning off and on the options in the shading panel:

I tried with the 32 bit download for version 2.75 and I tried with 64 bit version of 2.60. All are having the same problem on my OS set up. I boot from an external drive. I tried on a different computer with same graphics card and processor, but different screen, etc. Same issue.

I found the anti-Aliasing option and disabled it. problem is still present.

I'm fairly new to Blender, I tried to find the options you mentioned.
-multisamples is disabled. Restarted blender. problem persists.
-I'm on linux, but I downloaded the dll file and put it in my blender folder. I'm not sure blender is using it. I included a screenshot. I tried removing the blender-softwaregl thinking that may force the executable to use the other resource (not even sure if they're the same). In both cases I had the same result. Things ran but the selection problem was still there.

hmm. Tried changing the selection preferences without any luck. I tried the install on my laptop with Ubuntu 14 using the exact same .tar file and it worked without any issue, so maybe I am out of luck on this desktop. I updated my drivers on Mint and it didn't solve the problem.