In case it helps, I've also been experiencing this issue, however it stretches back much further than the last patch. The story goes something like this (weeks are approximate):
Week 1: Purchased the game (w000t!) (September 6th). No freezing or hangups, however attempting to go to full screen would crash the game/plugin. As a compromise I just zoomed the web page (Ctrl+Mouse Scroll Up) =D
Week 2: Started getting stuck at the end of the load bar as often as not. The game would appear to finish loading but then just sit there. I use Chrome but tried IE with the same outcome. Also tried returning the zoom level to normal and clearing out cookies and such.
Week 3: Load issue became more frequent on my desktop and home laptop. On the work laptop it started to occasionally flicker and freeze mid game (lost so much money on Preparations before I learned my lesson, lol). I tried a buncha different things each night after I got home and eventually stumbled onto a solution - making my browser windowed (not maximized). It turns out the game had in fact been loading the whole time and was just stuck (I saw someone else mention hitting Ctrl+Alt+Delete to force it to refresh but that never worked for me). When Chrome is windowed it never once got stuck. Lastly, the map screen in town and the right-side panels inside a dungeon started coming in completely black except for icons and text (probably unrelated though?).
Week 4: No soup for me..
Catapultam habeo. Nisi pecuniam omnem mihi dabis, ad caput tuum saxum immane mittam.