When one edits several tag wikis - which is quite useful when detailing the differences between two tags - this message pops up when saving. (ELU.SE style)
This message is shown when saving the second tag wiki. (Save first wiki, change tab, save second.)
If one tries saving it again 20 seconds later the same 30 second message pops up. Although after 30 seconds total one can save the second tag wiki entry.
It is a bit irritating since it's just sensitive to the context save tag wiki and not the context save tag wiki X. Furthermore the fixed time is not helping either.