>>>Am I somehow overlooking the Time Warp feature that has always been on the left side of the screen?
>>
>>I think Michel disabled it by mistake. To get it back, go to your Account Setup, Update your account, Update your account and set 'Height of the Toolbox frame:' to 63 or bigger value.
>
>I think you are correct. I had the Time Warp a minute ago, but when I logged out and backin, it disappeared. I checked my settings and it was zero so I changed it to 63 and lo and behold, it is back.

I now see, though, that it doesn't seem to be working quite right. I selected Go Back One Day and it seems to be displaying all messages since 12:01 a.m. yesterday. Didn't it used to go back 24 hours, to the same time of day?