I have been using Silverstripe for a couple of years now with great success. One issue that repeatedly comes up for us in South Africa is that certain clients report the error "[HTTP_MIME_TOO_LONG] The server response MIME header is too long" whenever a page is selected from the SiteTree in the CMS. ModelAdmin fails in the same way for these clients. The problem is not browser specific but seems to have to do with the ISP.
I have tried in vain to track down the source of the problem - there is a dearth of information on this HTTP error.
I would be most grateful if anyone could point me in the right direction.