This has been happening for the past several builds. I have not been able to find anything in Tracker though. When IDEA underlines in red an error, you can hit Alt-Enter to have an auto correct widget popup on the left, with a drop down showing suggested corrections. You are also supposed to be able to hover the mouse cursor over the error to achieve the same result. However, the only way I can use the mouse to get the popup is to click at the very left edge of the red underline, move the mouse away, and then hover over the error. Even then, it works most times, not all. If I click anywhere else in the line with the red underline, nothing happens except for the tooltip showing the error appearing. Note that it still works properly if I click on the red error marker in the right hand gutter.
Anyone else having this problem?