Valerie.m.juarez wrote:

gilleain: If you have time, could you please update to a recent supported version (see http://www.mediawiki.org/wiki/Version_lifecycle ) and tell us if this problem still happens? I do not get this error when inserting the above lines into the table. See: https://en.wikipedia.org/wiki/User:Valeriej/sandbox

If the problem does not happen anymore at all, please set the status of this report to RESOLVED > WORKSFORME. Thanks a lot for your help!

Most likely caused by using mod_security (or mod_security2) apache extension. If you are using it, I highly recommend disabling the extension (Check your error log, it will probably have entries if this is indeed the cause)

Valerie.m.juarez wrote:

Unfortunately closing this report as no further information has been provided.

gilleain: Please feel free to reopen this report if you can provide the information asked for and if this still happens in a recent supported version (see http://www.mediawiki.org/wiki/Version_lifecycle ). Thanks!