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If there is some PHP code anywhere inside the attributes area of an HTML tag, NetBeans will think the tag doesn't exist, and display errors accordingly. A minimal example: <table> <tr <?php $attribs ?>> <td>Test</td> </tr> </table> The <table> will be marked "tag content unresolved", the <td> will be marked "unexpected tag found", and the </tr> will be marked "unmatched tag". In other words, it seems the opening <tr> is rendered invisible to the error checker.
This issues is fixed in netbeans 6.7.1 patch release, should be available soon. Thanks for the report.