Java Issue

On a few machines Java isn't working properly. I can't get any java applets to fully load. I have plenty other where it is working fine.  Through investigation on a couple of the trouble machines it looks like it loads so far and then just stops. We are using 1.7 U25 with M030 pmlink.  I have tried reinstalling and a few other things and nothing seems to help.  It's like I'm missing the secret handshake......

Any help would be appreciated greatly!