Getting internal errors when trying to clone/save certain banners. It appears to be something to do with the translatable messages, since I haven't seen the problem for our normal banners without such messages.
Attempting to clone peter_WMCH_dsk_lg gave
[V@uMVwpAIC8AAFj3YUsAAACM] 2016-09-28 09:24:39: Fatal exception of type "MWException"
I then tried making a new banner at peter_WMCH_dsk_lg_alt1, and copying and pasting the content from the previous one. This worked at first, but attempting to save any changes to it after the initial one gives a similar error:
[V@uLSwpAIDUAAEfWOxQAAABM] 2016-09-28 09:20:11: Fatal exception of type "MWException"