netbean3.4 rc1(build200207252340):
To reproduce:
1.create a web module and add a servlet.
There are two directory shown in Explorer window
for the web module, one is the web module
directory and the other is the classed directory
of the web module.
2.Delete the WEB-INF directory inside the
webmodule directory. "Yes" on the confirmation
window. At this time the classes directory is
deleted and unmounted from explorer window.After
that, there is another dialog window of "Confirm
change". If press "Process All", then the
following exception will occur:
Annotation: The document  could not be loaded.
Annotation: File not found. Another application
may have moved the file or changed the name.
java.io.FileNotFoundException:
/export/home/hlu/NetBeans IDE
3.4/test/sampledir/wmtest/WEB-INF/web.xml (No such
file or directory)
        at java.io.FileInputStream.open(Native
Method)
        at
java.io.FileInputStream.<init>(FileInputStream.java:103)
        at
org.openide.filesystems.LocalFileSystem.inputStream(LocalFileSystem.java:478)
        at
org.openide.filesystems.LocalFileSystem$Impl.inputStream(LocalFileSystem.java:716)
        at
org.openide.filesystems.AbstractFileObject.getInputStream(AbstractFileObject.java:165)
        at
org.openide.text.DataEditorSupport$Env.inputStream(DataEditorSupport.java:323)
        at
org.openide.text.CloneableEditorSupport.loadDocument(CloneableEditorSupport.java:1068)
        at
org.openide.text.CloneableEditorSupport.access$1400(CloneableEditorSupport.java:101)
        at
org.openide.text.CloneableEditorSupport$Listener.run(CloneableEditorSupport.java:1502)
        at
org.openide.util.Task.run(Task.java:136)
        at
org.openide.text.CloneableEditorSupport$1.run(CloneableEditorSupport.java:313)
        at
org.openide.util.Task.run(Task.java:136)
[catch] at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:599)