Something nasty has happened...

[admin]

Got it. My bug. Fix coming.

Thanks!

[klownboy]

Session Manager is now working with beta 23.90.0423. I had to use the SM menu to reestablish icons associated with the sessions since they were lost for some reason.
Thanks Don.

[oblivion]

I shut my eyes tight and upgraded to 23.90.0427 direct from .0412 and can confirm that the session list has reappeared.

Also, whatever happened to lose the icons associated with the session list has also been fixed -- the lost ones haven't reappeared (assume lost for good) but the ones I'd replaced after I downgraded to .0412 from .0419 have been retained.

Thanks, Don, for finding and fixing the problem!