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On Mustang B51 + recent 5.0 dev build I get this message when I exit the ide: "Warning": "Cannot delete file Windows2Local/Components/callstack.settings in C:\Documents and Settings\temp\.netbeans\dev\config." Sometimes I get several messages with different .settings files. Looks like the settings files are not being closed properly somewhere.
Others have reported it. Seems to be a Mustang regression perhaps?
*** This issue has been marked as a duplicate of 63254 ***
v/c