So far, I have found no fix.
However, I did do some experimenting and found out more information about the problem.
First of all, the problems only occurred for me on 2 different MacBook Pros. On my Windows 7 and 8 PCs I have no problem.
Secondly, on the MacBooks that exhibited the problems, I tried different browsers, updating browsers, clearing browser and Unity cache, even re-installing Unity plugin. None of these things cleared up the problem.
As a final drastic measure, I wiped one of the MacBooks hard drives, installed a clean copy of OSX Yosemite, installed latest Firefox, installed Unity plugin, logged into SHSO, and STILL had the same problems.
So at this point, I can only conclude it's a problem with OSX, maybe a problem specifically with these models of MacBook Pro. The strange thing is, SHSO worked flawlessly on these machines Monday, but starting Tues the problems appeared.
Destroyer, what hardware are you using for running SHSO, when did you start seeing the problem, and what steps have you tried to fix?