For those who experience problems with Selenium 2 hovering

The common practice of simulating mouse hovering in Selenium 2 is to move the mouse cursor to the element located and wrapped with WebElement. This should look like this.

            Actions builder = new Actions(driver);
            builder.moveToElement(lookupXPathExists(xPath)).build().perform();

Where driver is your current WebDriver implementation and  lookupXPathExists(xPath) is a kind of procedure returning you the WebElement object by xPath (see my older posts for more details)

However a lot of people trying to apply such the approach for both FF and IE browsers experience the same issue: once your scenario tries to perform some next action after hovering (ex. click the button appeared after you have hovered the element) the hovering gets canceled.

So the only way for us is to wait until this issue is resolved. Use Chrome driver so far.. :)