If I add a normal text widget (no code) all is fine.
Also as you can see at
www.altendorff.co.uk I have 7 text widgets containgin code working fine.
The effect of deleting all text widgets on both sidebars - while leaving all other widgets working and the site itself working in all other respects can be created by adding the following code in a text widget.
----------------------------
<html>
<!-- Begin - Language -->
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Cfr&hl=en&ie=UT F8" title="Français" rel="alternate">Français</a>
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Ces&hl=en&ie=UT F8" title="Español" rel="alternate">Español</a>
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Cit&hl=en&ie=UT F8" title="Italiano" rel="alternate">Italiano</a>
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Cde&hl=en&ie=UT F8" title="Deutsch" rel="alternate">Deutsch</a>
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Cja&hl=en&ie=UT F8" title="日本語" rel="alternate">日本語</a>
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Ccn&hl=en&ie=UT F8" title="简体��文" rel="alternate">简体中文</a>
<a href="http://www.google.com/translate?u=http%3A%2F%2Fwww.altendorff.co.uk/index.php&langpair=en%7Cru&hl=en&ie=UT F8" title="Российская" rel="alternate">Российская</a>
<li>
<a target="_blank" title="Mitch Ratcliffe" href="http://blogs.zdnet.com/Ratcliffe/?p=223">
Engarble!?</a>
</li>
</html>
---------------------------------
Can you divine why this is happening?
I have a feeling I am heading for the idiot of the day award :-)