subcategories in category page loads very slow

[DennisRR]

I've searched and read everything I could find in the forum but cannot solve it. The page where the subcategories are, loads very slow, taking about a full 1-2 second to get to the next one. There's only now about 30 subcategories, but it doesn't matter if I have 2 or 30, it's very slow, taking about 2 seconds for each category (on a 2000K broadband connection). I have version 1.7.4 and I tested it on Firefox 2.0 and Explorer 5.5 I have no random image and the rest of the page is simple in design (simplified default template). How can I speed it up? I appreciate any answer and I'll do my best answering some of the other questions here at the forum. Thanks.

Dennis