IntelliJ IDEA 10.5.2 EAP 107.509
A new EAP build of IntelliJ IDEA 10.5.2 is available now. The most important thing to note about this build is that we’ve finally tracked down the cause of the problem causing stale error markers to remain in the editor, and we hope that it has now been fixed. So please test and report.
You can find the list of other fixes in the release notes.