Dialog boxes out of view that cannot be moved or closed.

While I was entering my incoming e-mail credentials something strange was happening with the dialog boxes.
When I would test my incoming e-mail settings a dialogue box would pop up in the upper left corner that said connection successful, however you cannot close the dialog box or move into view to be closed, so you have to refresh the page and start over which really isn’t that big of a deal. “I just wont test it.” However when assigning the sent folder and trash folder the dialog box was also shoved up into the corner. luckily part of it was exposed so I could scroll through and select the appropriate folders. I have avoided this being a problem but I have yet to try out the entire program. Has anyone else experienced this?