Regression: release vs. plain?

I have noticed, that the regression reports posted to this
list point me to:

http://engineering.
meta-comm.com/boost-regression/CVS-RC_1_34_0/developer/threa
d_release.html

When accessing the regression from the boost homepage I end
up on:

http://engineering.meta-com
m.com/boost-regression/CVS-RC_1_34_0/developer/thread.html

Can anyone please explain the difference, and which tests
are relevant 
for release getting ready?

Roland
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