Comment 1 for bug 918257

openerp-web does not exactly "use a timezone", it fetches UTC data from the server and shoves these in javascript Date objects for display. These objects do have a concept of "Local Time Zone", which they get from their "host environment" (the web browser and by extension the OS). This is both under the assumption that the host is correctly set up and because most third-party widgets need and use Date objects, both consuming and producing, in its local form.

openerp-web makes absolutely no use of time zones configured in openerp at this point.

What kind of setup do you have that you'd get incorrect time zones in openerp-web (but I assume not in your system clock)?