I am running MW 1.9 on IIS6 with MySQL 5 and Php 5. Some of my users are encountering a strange error. I am having trouble tracking down the problem. Here is the scenario: The user logs into the wiki. He can view pages without any problems. He can sometime create/edit pages. However, sometimes when he is trying to create/edit a page, he will get this message: "Do you want to open or save this file". Once he gets this message he is unable to create/edit pages. When he gets this message, I have him close his browser and log back in. I have had him switch browsers too. But he can't create/edit a page. Time appears to be the only solution to the problem. Time goes by and things clear up for a while. But the problem always comes back. This is NOT an isolated incident. It has happened to several of my users. I suspect that it might be an IIS issue but the logs do not show any problem. Has anyone experienced this before? Thanks! Michael L. Bowden mlbowden(a)comcast.net