Bamboo Failed to Run the Backup message covers header

Our bamboo server failed to run the scheduled backup (things happen!). I have rerun the backup and it successfully passed.

However, the error message doesn't seem to disappear - is there a way to clear it out? It's showing as a yellow alert box on the top of each page in Bamboo.

// side issue there looks to be an odd css problem in the last update of chrome, so its hovering over the menu links - hence the desire to clear out the error