Since this afternoon, I am fighting with ZServer. Currently, it seems Zserver is winning .... I do not understand, what I see... At work: Zope 2.1.6, Sparc Solaris 2.7, Linux Netscape 4.51 Sometimes, images are not shown by Netscape (broken image). No "simple" reload is able to change this, however a "forced" reload lets Netscape show the image correctly. From then on, the image is always shown correctly: by "simple" reload, "forced" reload or directly (served from cache). The strange thing, inside "Image.index_html" the failing "simple" reload and the succeeding "forced" reload look completely identical. At home: Zope 2.1.6, Intel Linux 2, Linux Netscape 4.5 All images are always shown correctly. However, there is no log entry in "var/Z2.log" for about 50 % of the requests that are answered by a 304 response. It is non-deterministic whether a log entry is written or not. Did you ever see something like this? Dieter