We have a file upload that works most of the time, but some users in random offices around the country report that their browser times out in the middle of the upload (which can sometimes take several minutes depending on the size of the file) and says it cannot find the server. Obviously they blame us because our web app appears to be failing. But it's a pretty standard file upload bean used in conjunction with an HTML form on a JSP, and it works for most users. Am I right in telling them that their browser is choking in the middle of the upload? Any idea what the reason might be?