Thanks for all the good and valuable feedback, explaining your workflows, and discussing current flaws & potential improvements in the long run.
For the short term I have now created a priority called "Immediate" which should be used to identify issues that need immediate attention. This means that teams don't have to change their use of "highest".
Please set IMMEDIATE PRIORITY when it is appropriate.
The documentation at http://www.mediawiki.org/wiki/Bugzilla/Fields has been updated accordingly: * Immediate priority: Must be fixed immediately (means: "Drop any other work"). Reports should have an assignee set in the "Assigned to" field. * Highest priority: Should be fixed next by a team. Teams should only have very few issues (preferably one) with highest priority at the same time. Reports should have an assignee set in the "Assigned to" field.
andre