Opera phones, including my Sony-Ericsson P800, use the handheld media type allowing the page designer to make a customised style sheet for phones. If there is no handheld style sheet Small-screen rendering is used instead.
But what if a handheld style sheet is provided, but it is bad for you? On this phone, using the fairly old 6.31 version, you are stuck with what you have got. There aren’t many sites yet that make handheld versions, but we do. www.opera.com has an excellent style sheet, while the My Opera forums have a bad one (this will change) including setting display:none on information you need.
And here is the tip: Toggle the Edit > Fit to screen option. The first time SSR is overridden by the handheld style sheet, but the second time the handheld style sheet is ignored and SSR is applied. This was not intended but has proven fortuitous.