Bug report on the problem:
http://mosquito.wordpress.org/view.php?id=1323
You can grab the attached patch file (I’d suggest the 2nd one) and use it to correct your wp-blog-header.php (replace the line starting with – with the line starting with +), or grab this version:
http://trac.wordpress.org/file/trunk/wp-blog-header.php?rev=2600&format=raw
and replace your current one with it.
Thanks. It now works great. I am amazed at the support for wordpress!!