Your browser version - in case it matters?
Would you mind a screenshot?
Problems with other menu/text areas?

Running: Opera 30.0.1835.59, Windows 8.1
I have the same problem as Rupak, have tried the same fixes as Rupak, yet the problem persists: blank address bar and all other menu/text bars. I can rightclick mouse in those bars, hit copy, and paste into WodPad, and the text that couldn't be seen or highlighted in the menu/text bars will paste (be seen) in WordPad. I've uninstalled Opera, run CCleaner, shut down computer, and reinstalled Opera twice, changed the Speed Dial theme 3 times, changed the Win8.1 desktop theme several times, and changed the Win8.1 background/text colors several times . . . all without resolving the issue. I didn't have this issue with Opera + Win XP or Opera + Win 7. Do you think this is an Opera issue or a Win 8.1 issue? To whom do you think this issue should be addressed?
Thanks

I despise Google with a passion and wish to purge Google search tools from my Opera browser and replace them with StartPage, Ixquick, or DuckDuckGo, especially replacing the Google search bar on the Speed Dial page. I'd also like to make StartPage my default search tool, but Settings doesn't appear to accommodate this. If any of this is possible, please advise how to do it. Thanks