Upgrading Drupal

After updating my site (http://new-spirit.org.il) from 4.6 to 4.7(.2), this is the result: http://new-spirit.org.il/new-spirit/drupal/
Nice, isn't it? see all those funny characters below (not the hebrew, I mean all those " יצירת תוכן " etc.)?

I tried upgrades from 4.7.0 to 4.7.1 and 4.7.2.
In both cases all my links on the site are broken. My drupal environment is installed in www.mysite.com/network
After the update.php script the word network seems to be replaced by xxxxxx.xxxxxx//cgi-bin/.... where the x's are numbers.
In addition the background is gone. The theme is all messed up.
What could be causing this?
thank you.
Mike

Hi there,

A slight upgrade niggle...

This code was fine in the 4.6 site.

<A HREF="?q=aboutus">About Us</A> &nbsp &nbsp &nbsp
<A HREF="?q=funding">Funding</A> &nbsp &nbsp &nbsp
<A HREF="?q=privacy">Privacy Statement</A> &nbsp &nbsp &nbsp

But now the &nbsp string prints instead of the expected whitespace .

Does this block no longer support HTML input?

Hello all,

I am using drupal on my site at www.michael-and-mary.net

I have worked my way through a 4.5.2->4.7.2 upgrade. Everything seems to be back in operating condition but Search, which yields these two error messages, in this case produced by a search on the single term "rhine"::
(id info obfuscated)

HI,
I have upgraded my drupal version from 4.6.6 to 4.7.2 and since then its been a nightmare.
I am getting all sorts of errors

1st error