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I've reproduced this bug with build 200302130100, using jdk 1.4.0_03 How to reproduce: 1) Mount any empty local folder, convert it to WebModule and create any JSP there. 2) Execute this JSP. 3) Now delete WEB-INF folder in the Filesystem window. /WEB-INF/classes is unmounted automatically 4) The final step : convert your directory to WebModule one more time. /WEB-INF/classes will be mounted with 'Invalid' comment.
Reproduced
Setting the target milestone to 4.0
Hopefully this one is very rare now.
Fixed by the new Projects infrastructure.
v.