Is the Ideas discussion board broken ?
This morning, I went to check the Ideas discussion board for General User Interface and found it empty. Then I found that that ALL forums in the Ideas section were empty. Yet Q&A is fine.
Investigation using browser diagnostics revealed that all the elements in the Ideas section were present, they were just invisible. see first screenshot
For comparison, here a screenshot of the Q&A search discussions,
There is something different in the presentation of the Ideas section which causes all the content to be invisible.