It is the rendering toghether with the loading of images. Using the subsilver solves it though. But then the site's look and feel is lost.
Also when i start editing a post the emoticons appear to be flying inwards.

The Stats:
I am using an packard bell laptop pentium m 1,73 ghz with 1g memory and nvidia geforce go 6600. My inet is adsl with 1122 kbps download speed. My laptop is connected to the router via wlan (5,5 Mbps). The browser is use is ie7 on xp home.

[edit] it seems that original site layout prevents caching. Now even the Emoticons behave.[/edit]