I'm using plain old Mozilla. (According to 'help': Mozilla 1.4
Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624)).
I looked up Deepest Sender on the web, and actually, it looks more confusing and icky to me than LJ's own screens. I like a stripped down interface. For example, my preferred editor is vim. No buttons, just fingers on the keyboard.
My problem seems to be in understanding what the various commands mean. I'll see it on the menu, think "oh, it does this!," invoke the command, and then have something unexpected occur. Like deleting the blank image gallery. I think that should should have been impossible -- but I did it.