Classification: UNCLASSIFIED Hello, First off, I know this is in the collector, number 382, but I'm wondering what others' experience is. I was using 2.5.1 and had a site using exUserFolder for authentication (pgAuth), and had no problems in Internet Explorer, even with IE option to 'Show friendly error messages'. As soon as I tried to migrate my site to Zope 2.6.1b2, I started getting the IE error message 500. The submitter of issue # 382 says the bug was seen in 2.4, so I'm wondering why no bug in 2.5.1 but now it's buggy in 2.6.1? Diffing HTTPResponse.py doesn't show anything that looks significant to me. I don't really like the option to edit HTTPResponse.py to return '200' instead of '500', but are others running into this and solving the problem this way? Thanks, Rob Boyd