If you choose to install a beta product then you should be prepared for the
bugs associated with that product and the time required to fix the problems
the beta product creates. If you don't want to deal with the problems, don't
install unfinished beta products.
While MSFT has not yet issued any patch to fix the compatibility problems
with IE8 RC1 and Publisher webs, if you design your site to work correctly
with IE7 and FF3, then the only major problem I have found thus far is the
Publisher wizard built navbar does not render. Given that the final release
of IE8 has not been issued, making any changes in your website at this point
might be premature. I am still somewhat confident that MSFT will address
this issue eventually.
With that said, besides manually building a navbar, I have had time to do
more testing and you can disconnect the navbar wizard and the navbar will
render and will work correctly. Select the navbar > Arrange > ungroup. You
will need to do this with top, side and bottom navbars on each page and then
republish new web files. While this workaround will fix the navbar problem
it also means that if you want to add a new page to your site then you will
need to rebuild the navbar or the new page will not be automatically added
to the existing navbar. Once again, I think it is premature to get all that
worked up about compatibility issues with a beta product, and that the
wisest course of action is to wait for the final release of IE8 and see what
if any patches or changes MSFT makes with either IE8 or Publisher to address
these issues. However since you have chosen to install the IE8 beta and
can't figure out how to uninstall it, then you do have a solution that may
or may not work with the final release of IE8.
As per your other issue with a link not working correctly, then I would
suggest testing it in FF3. If you have the same problem, then chances are
there is a fix. And chances are it is because you have grouped the text box
with the link to another design element, which leads to a simple fix.
Ungroup that text box and test the link. If that does not fix the problem
then feel free to post a link to the page where you are having problems, and
we will try to help you. It is also possible that you are simply embedding
the link incorrectly, so also provide the link and code that you are trying
to use.
DavidF