I am not exactly sure of the specifics of your issue (i.e. when do you get this error?) - if you think it is a product issue than please raise it with the support team. Before doing that however:
Have you followed the advice in the Browser Automation Guide about which attributes are best to tick and not tick. What you may be seeing is just because you have experiemented with the element attributes you are leaving ticked.
Also, have you tried using the Accessibility mode interface instead, it also works very well with browser applications (just press the alt key to change modes). There is an Accessibility Mode guide on the portal that gives you some recommendations when using it (especially around speeding up that interface).
