I just borrowed my coworkers workstation to ask a question on SO. He had just posted a question before I borrowed his workstation. After logging him out and and logging myself in and attempting to post,
I was given the 20 minute posting timeout:
Why does that appear when I attempt to post? Why should it matter that we are using the same machine and how does SO know? I tried in multiple browsers and with more of my colleauges and we have found that the behavior is reproducible.