I installed latest build and found this problem with code folds.

Steps:
- Create "Welcome" sample project
- Open "welcome.h" in built-in editor
- Remove last line in file (empty line)
- Close file in built-in editor
- Open "welcome.h" in built-in editor again
- Folds are broken (code folds)
- cat ~/.netbeans/5.0/var/log/messages.log

------------------------------------------------------
exception: line 10:25: unexpected char: 0xFFFF
line 10:25: unexpected char: 0xFFFF
        at
org.netbeans.modules.cnd.modelimpl.antlr.CPPFoldingLexer.nextToken(CPPFoldingLexer.java:390)
        at antlr.TokenBuffer.fill(TokenBuffer.java:69)
        at antlr.TokenBuffer.LA(TokenBuffer.java:80)
        at antlr.LLkParser.LA(LLkParser.java:52)
        at
org.netbeans.modules.cnd.modelimpl.antlr.CPPFoldingParser.translation_unit(CPPFoldingParser.java:139)
        at
org.netbeans.modules.cnd.modelimpl.antlr.CPPFoldingParser.parse(CPPFoldingParser.java:69)
        at
org.netbeans.modules.cnd.modelimpl.csm.core.FileParser.parse(FileParser.java:41)
        at
org.netbeans.modules.cnd.editor.parser.CppFile.startParsing(CppFile.java:120)
        at
org.netbeans.modules.cnd.editor.parser.CppFile.startParsing(CppFile.java:98)
        at
org.netbeans.modules.cnd.editor.parser.CppMetaModel$1.run(CppMetaModel.java:70)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:493)
        at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:926)