Found a bug with mod-pagespeed if you use ipboard 3.2.2.
I found that the editor did not work, showing a blank space rather than an editor. Took a while but I located the problem as being my installation of mod-pagespeed interacting with CKEditor used by ipboard. Link here explains – http://community.invisionpower.com/topic/348577-google-mod-pagespeed/page__pid__2178923
I should update pagespeed but there looks like there is a fix in the next version of ipboard and I don’t really feel like installing python 4.6 at the moment just to fix this issue.
Therefore, I found a nice simple solution. Turn off mod-pagespeed, I did this by editing pagespeed.conf and turning it off.
I’ll turn it back on after I upgrade ipboard.