Just rated your thread, works fine for me.
Must mention that you are most likely the second user to make a thread about this issue, @akim14 has same problem as well.
Go to chrome://flags and post a screenshot of all settings, a gif will be useful. You must have something enabled or disabled which you should not have. Do you recall changing anything, or installing anything on your pc recently?
IPV6 ip breaks vBulletin 4. No surprise there!
I'm going to have to patch this manually.
I'll post a global announcement once the IPV6 upgrades are complete. If it is still broken at that point, make another thread.