cached theme images not displayed (SVG)

1. Select the Clean theme and navigate to its location in '/theme'clean'. 2. Create an svg image in the 'pix' folder and call it 'myimage.svg'. It can be of anything or an adaptation of an svg you already have. 3. Alter the Clean theme 'columns3.php' file to output pix_url of 'myimage.svg' and 'anotherimage.svg', such as: echo '<img src='.$OUTPUT->pix_url('myimage', 'theme').'>'; echo '<img src='.$OUTPUT->pix_url('anotherimage', 'theme').'>'; 4. Turn theme designer mode off. 5. In FireFox, purge all caches - this will be fine as this will not be 'columns3.php' layout file. 6. In IE, using the browser development tools, set the emulation to be '8' for the document mode and 'Internet Explorer 8' for the user agent string. If in doubt, see . 7. Sill in IE, navigate to the front page as it will have the image being that 'columns3.php' is the layout file defined in 'bootstrapbase' for the 'frontpage' layout. 8. Observe no images. 9. Go back to FireFox and navigate to the front page. 10. Confirm the 'myimage' image does display. 11. Confirm that there is the file 'anotherimage.error' in the moodledata folder for the cache of the theme, e.g. 'localcache\theme\1440933977\clean\pix\theme\anotherimage.error'.