I found a bug in ExtFile product. The handling of If-Modified-Since HTTP header was broken, leading to severe problems when "reloading" images (especially when running zope under Apache). Here is the correction (vs ExtFile.py,v 1.37.2.1): --- ExtFile.py Sat Dec 22 23:40:40 2001 +++ ExtFile.py.orig Tue Sep 11 02:04:10 2001 @@ -216,8 +216,8 @@ last_mod = long(self._p_mtime) else: last_mod = long(0) - if last_mod > 0 and last_mod <= mod_since: - REQUEST.RESPONSE.setStatus(304) + if last_mod > 0 and last_mod < mod_since: + RESPONSE.setStatus(304) return '' if hasattr(self,'has_preview') and self.has_preview: has_preview = 1 < if last_mod > 0 and last_mod <= mod_since: < REQUEST.RESPONSE.setStatus(304) ---

if last_mod > 0 and last_mod < mod_since:

RESPONSE.setStatus(304) return '' if hasattr(self,'has_preview') and self.has_preview: has_preview = 1