[xwiki-users] Plain text "select x into y" in any document breaks xwiki.com

Hi, Trying to view/preview any page on free xwiki.com hosted containing the text: select x into y causes nothing more than the following message to be displayed: We are currently doing performance maintenance of our servers. The service will be back in a few minutes. Sorry for the inconvenience. 'x' and 'y' can be any number of words. Note that this happens with plain text - no velocity or anything, e.g. simply a document containing the text: Press the 'add' button to select which plugin is loaded into the current effect slot. I haven't raised this as bug on JIRA since I can't reproduce it outside of xwiki.com hosted wikis. So I guess it's some configuration issue or some extra protection gone wrong on xwiki.com. Thanks, Robin.