Since moving to 1.8.3 images and HTML are returned broken through file.php. I can very occasionally get an unbroken through, but this is highly unpredictable. HTML pages stored within MOODLEDATA also are missing the last few characters (ending '</html ' for example) and on firefox HTML pages have two garbage characters at the start of the page. All files are fine when viewed directly from MOODLEDATA and by moving them into the wwwroot and serving through the webserver without file.php Move to 1.8.3 was a new installation, on the same server, rather than a 1.8.2 upgrade. In IE if I view the image directly in the browser with file.php, rather than embedded in a page, it is broken but if I refresh a few times I get the file content. See attached. Have tried changing the character encoding of the HTML files to no effect. Have checked config.php, file.php, filelib.php and libcurlemu for trailing whitespace. Please help! I ignored this problem during testing of the new installation due to MDL-10882, but still had this problem switching over.