Difference between GenII and Gen III PMAG's?

Could someone please tell me the differences and the advantages of the GenIII OMAG, versus the GenII PMAG?

Thanks,

Tack

From http://www.magpul.com/catalog/index.php?main_page=product_info&cPath=80_120&products_id=271 :

It has come to the attention of Magpul Industries Corp that a number of users have experienced feeding problems with their PMAGs™ due to unusually tight magazine bodies. The primary symptom is sluggish follower response, or snagging when loaded with more than 20 rounds. These issues are a result of dimensional changes occurring after the PMAG™ left the Magpul factory, and only affect the PMAG™ body. Other PMAG™ components such as the follower, lock plate, floor plate, and impact cover are unaffected.

Improvements in the manufacturing process have resolved this issue on all PMAGs™ dated 7/07 and later. Although this issue affects only a very limited number of PMAGs™, Magpul will replace all PMAGs™ dated 6/07 and earlier. To determine your PMAG’s™ date of manufacture, check the round date code on the upper half of the left side of the PMAG™ (see image). The arrow points to the month of manufacture, and the year is in the center. If you are unsure of your PMAG’s™ performance, we encourage its replacement.