I have installed Idea 4.0.3 EAP on Linux (ASP 9.2). After week of correct work parser begin to fail on classes from libraries (external jars, but not jdk archives). I can use autocomplition on packages (org.apache.log4j) but concrete classes are not recognized (org.apache.log4j.Logger is highlighted as error). I'am clear caches, make new project, but classes are not resolved by parser. At the same time action "rebuild" and "compile" in IDE working properly. Trouble was "resolved" by creating directory and unpucking all library classes into it (and adding this dir in project classpath). And a few word at last - during refreshing "failed" jars message dialog has strange view ( flickered) but no errors at log file appears.