sorry for the flurry of questions. Two problems:
I changed the template of the tiki-top_bar.tpl, removing the tiki information and adding an image (long and thin, 75 pix high by 1024 long). The website displays OK in Microsoft Internet Explorer, but does not in Mozilla, Konqueror, etc. The left column, middle column and right column overdraw the top bar.
It looks (from viewing the source code from Mozilla) as though only one table is created, for the left, right and middle columns, and this table overwrites the top_bar. I tried editing tiki.tpl and creating tables, table rows, etc. to separate the top_bar from the other columns, but there was no change in behavior.
When making images in image galleries, the thumbnail generator does not create a thumnail of the correct size (100 x 100 pix) but instead creates a thumbnail of the original image size. It looks like a thumbnail image is created but not resized.
Also when I try the user registration using "prevent robot registration" feature, I do not get a "random image" with numbers or anything. No image at all. I have PHP 4.3.4 installed, but it seems that GD is not working? I tried to show tiki-usage_chart.php as suggested on an IIS problem page (I have apache 1.3.26) and the image did not display, but neither did I get any errors.
Help anyone? Thanks.