[ JDK VERSION : 1.7.0_45 ]

STEPS:
   1) Have project with ./lib/A.jar linked relatively via
Project->Libraries->Add JAR/Folder.
   2) All java sources of project compile successful ==> no error badges.
   3) Externally replace the jar by a same named A.jar with little differences
(e.g. renamed methods).
   4) Manually compile a single java file which does no more compile.

ACTUAL:
   3) No error badges showing that some files do not compile.
   4) Compile errors in Output pane, but again no error badges showing that
some files do not compile.

EXPECTED:
   At least after manual compile with errors, error badges should appear.