Double clicking an element shows "move target out of bounds" exception

Select Frame    content
Set focus to element    id=postino
Double click element    id=postino

The above is the script I am using to double click where on double click it opens a popup in webpage, its always showing move target out of bounds exception. Also while using mouse over also, its showing same exception. Please help to rectify it.
Input text, click element working fine with same id. Issue with mouse over, double click actions