I use 8.04 on my workstation and java 6 works just fine.  You could try
that.

On Mon, 2008-07-14 at 13:25 -0400, jonafc wrote:
> So much for Handy Heron.
> 
> Trying to run Newtorker NMC client applet on Ubuntu 8.4 with Sun Java  1.5-16 
> installed. I get the administrator dialogue box, enter password then a full 
> screen of Java boarder of nothing else .....
> 
> Any 1 help me, probably a Java issue but causing a big problem.
> 
> Thanks
> 
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David Dulek
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Fastenal Company
E-mail: ddulek AT fastenal DOT com
Phone: (507) 313-7033
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