5
Thanks for your reply and advice. The problem is now solved (hopefully).
Here is what happened:
The site has been running under XOOPS 2.0.16 for a couple months now, without any problems (relevant to this topic).
About a week ago, the top banner disappeared without warning. I thought it may have been a problem with the theme, the database, or the banner.php file. When I changed/reloaded all of these, the problem still persisted.
However, when the directory containing the banners were renamed from ..mysite.com/banners/ or ...mysite.com/banner/ to something else, the banners reappeared.
So the problem is most likely at the webhost side. I will have to investigate further. Thank you again for your replies