Description of problem:
Bugzilla does not detect mid-air collisions when the person making the second
modification began looking at the bug before any modification had been made to
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. create a new bug.
2. bring up two copies of it in two different browser windows
3. submit a change to one of these.
4. submit another change to the second one.
The title says a mid-air collision occurred, but the rest of the page looks like
a normal bug change response and the changes are made.
a complete mid-air report page should be shown and no changes made.
Ok, should be fixed now. Please reopen if this is not the case.