Only MS updates were done on the 13th, the problem started on the 25th, the same day the delete option was made available and the problem with posting comments happened.

Hi Frankie. I was having the same problem. I just disabled "Ghostery " and it seems to work fine now. Do you have this add on?

Ghostery seems to be the problematic one for a couple of folks, Frankie. See if it's on your machine.

just like Frankief it happened when the Delete column was added

on Firefox (the last 3.6.13 + 3.5 + 2.0) I can't edit the default Galleries filters: I'm sticking with "9" and "Tiles"

but not only: I'm completely missing the All Time + Today columns in MySkins list page

at the moment with Opera and Chrome I can manage the above issues but the same when I open the browsers or I reload the pages I lost the changes for the "9 Tiles" default layout

I managed to have the 2 missing columns on MySkins list page setting different levels for Full Zoom and Text Zoom with the addon NoSquint

look at the picture

thanks for your support DrJBHL !

Thanks to the CarGuy great tip https://forums.wincustomize.com/404729

I also managed to have back (on Firefox) the  "View > LIST" on the galleries not loading anymore through the "Explore FILTERS"

try with ObjectDock https://www.wincustomize.com/explore/objectdock/pagesize/150/view/list/

and ObjectDockBackgrounds https://www.wincustomize.com/explore/objectdock_backgrounds/pagesize/150/view/list/