Plugin Check page not working right; after updating, plugin still shows "update"

Question

I noticed after running "find updates" that the Acrobat Reader
plugin needed to updated, so I installed the 9.4.1 update, (from
9.4.0). Afterwords, I rebooted the machine. I launched firefox and
tried to verify all plugins were "update to date" but the same acrobat
reader plugin is still showing as "update" (i.e., firefox thinks it's out
of date).
about:plugins shows the installed version as 9.4.1.222
Moreover, multiple machines show this issue, not just one.

Answer 1

There's a couple of things to try, since this is an old system.
1 -- disable hardware acceleration in Flash Player, if enabled.
a)  Go to this page -- http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager02.htm l
b)  Right click the Global Privacy Settings panel  "box".
c)  Scroll down the drop down list and left-click on "Settings."
d)  If you see a check in the small box next to "...hardware acceleration," click on it to remove it.
e)  Save your setting change, close out your browser, open it again, and try watching a video to see if it stutters.
2 -- disable hardware acceleration in Firefox, if enabled.  (This may or may not impact your ability to watch Flash videos, but it has caused a number of issues with older systems.
a)  Click on your Firefox TOOLS menu
b)  Click on OPTIONS
c)  When the small screen pops up, click on the ADVANCED tab
d)  If there's a check in the box next to "use hardware acceleration when available," click on it to remove the check
e)  Click the OK button.  Close out Firefox, and reopen it.
HTH,
Ortho_Fan