Looks like the subject line is there now and there is nothing to be solved.
I have just found out that the issue looks different in Opera which I normally use (right sidebar is missing). In IE the sidebar is missing as well but the central part of the webiste spreads across the sidebar placement, Opera does not do this. May help to solve the issue, just adding.
I am not an expert, but have you tried to enter the price just plain “1200” without any commas and other punctuation? I guess that commas etc. is the way the product price is displayed but not the way it should be enter by the seller…
