Installed version differs from downloaded version

The alert at the top of the WP page indicated that a new version of Gravity Forms (1.7.3) was available, so I used the automatic download function to install it. However, my pluggins page says that I installed version 1.7.2 instead.

Just before doing this, I had followed exactly the same steps to download and install version 1.7.3 on my testing/sandbox site. When completed, my pluggins page for that site indicated that I had installed version 1.7.3 as expected.

Is there any reason why I should I be concerned about this?

No, I do not have an update available on my primary site. As a matter of fact, when I checked my "Gravity Forms Updates" page, it said that my version of Gravity Forms is "up to date."

In any event, I'm reluctant to mess with something that's working well, so I'll just wait until your next version becomes available and install that one.

Thanks,
Don