Clicking something which brings up a tooltip-ish floating element, which disappears on mouseout prevents clicking on something covered by that floating element about chromedriver HOT 15 OPEN

Not sure I understand. You click, an overlay appears (and won't disappear till 
you move off), and then you try to click an element under the overlay, which 
doesn't work.  How is the user able to click the element underneath? Can't you 
just do what the user does?

Test case:

WebDriver driver = new ChromeDriver();
driver.get("http://www.illicitonion.com/44/index.html");
driver.findElement(By.id("bottom")).click();
driver.findElement(By.id("top")).click();

The key is, the mouseout event gets rid of the hovering element, so as soon as 
the user moves the mouse toward the desired element, the hover disappears, but 
the chromedriver does its calculation before trying to move the mouse

I see. This should be fixed.

Until then, tests should do a mouse move and then a click.

Unable to reproduce issue with chromedriver:2.15

Please try with latest versions and let us know if you are still facing the 
issue.

Sample Code:
System.setProperty("webdriver.chrome.driver","drivers/chromedriver.exe");
        WebDriver driver = new ChromeDriver();
        driver.manage().timeouts().implicitlyWait(1, TimeUnit.MINUTES);
        driver.get("http://alienryderflex.com/mouseover_menus_example.html");

        WebElement parent = driver.findElement(By.linkText("Menu 1"));

        Actions acts = new Actions(driver);
        acts.moveToElement(parent).build().perform();
        driver.findElement(By.linkText("Option A")).click();
        //acts.click(driver.findElement(By.linkText("Option A"))).build().perform();

        driver.switchTo().alert().accept();
        System.out.println("complete");

Misinterpreted issue previously.

Able to reproduce issue with chromedriver:2.16, chrome:v43.

When the target link is under any pop-up/menu item, and user tries to click on 
it, error is throwing. If the link is not under pop-up/menu item, no error is 
generated. Same is working fine firefox.

Please use attached html file to reproduce issue

Sample code:
WebDriver driver = new ChromeDriver();
        driver.manage().timeouts().implicitlyWait(1, TimeUnit.MINUTES);
        driver.get("file:///C:/Users/Desktop/Menu.html");

        WebElement parent = driver.findElement(By.linkText("Menu 1"));

        Actions acts = new Actions(driver);
        acts.moveToElement(parent).build().perform();
        acts.moveToElement(driver.findElement(By.linkText("Option A"))).build().perform();

        Thread.sleep(5000);
        driver.findElement(By.id("link1")).click(); // Generates error as link is under menu item
        //driver.findElement(By.id("link2")).click();   // Works fine as link is not under menu item

        //driver.switchTo().alert().accept();
        System.out.println("complete");