Hi, I have detected what seems to be a bug in the recycle logic of TomCat 3.2.1. What seems to be happening is, that a response object of some kind is using a Writer and processes the request. In some other request the BufferedServletOutputStream's "usingWriter" flag is still set, in other words, the recycling doesn't seem to work properly. I can demonstrate the problem and create a workaround by adding the following code on top of my servlet. It uses a method isUsingWriter(), which I have added to the BufferedServletOutputStream class: ServletOutputStream os = pRes.getOutputStream(); if (os instanceof org.apache.tomcat.core.BufferedServletOutputStream) { org.apache.tomcat.core.BufferedServletOutputStream bsos = (org.apache.tomcat.core.BufferedServletOutputStream) os; if (bsos.isUsingWriter()) { Trace.Log(this, "tmGet", 5, "OutputStream is using Writer"); bsos.setUsingWriter(false); } }