The solution which works pro tem for me (but maybe not for you) is to click the 'stop script' button when the error message comes up.
What I can't work out is where the script is that is causing the problem or how to validate the html in the template - any suggestions from people who have had to deal with similar problems would be much appreciated.
3 hours later: I seem to have resolved the problem - in part by changing templates to try and deal with the font size problem I was also having. However I'm still looking for a template which is not as narrow as those designed for very old monitor widths and one which is not as stretched as the wide monitors. I've also removed a bit of code which seemed to be causing problems.
Can people let me know:
- if this new template causes them reading problems and
- also whether you can now click on links and images without problems