lion 10.7.4 and java problem

i recently updated to lion 10.7.4 and noticed that Pogo games stopped loading. (on my PC they work fine.)

later, used safari to do something that had worked before but now noticed that the graphic that you're

supposed to be able to read for security authentication was not displaying.

seems to be that lion 10.7.4 is causing some problem with java.

oh, i have a macbook pro that is less than a year old.

is there some way to uninstall 10.7.4 to get back to 10.7.3 ?

thanks