Eclipse Unhandled event loop exception

Im getting an exception in my eclipse indigo – im using the PDT plugin as well.. any ideas? When i code the lines start acting funny, disappearing, then reappearing.

Unhandled event loop exception

java.lang.Error: Error: could not
match input at
org.eclipse.wst.xml.core.internal.parser.XML10Names.zzScanError(XML10Names.java:473)
at
org.eclipse.wst.xml.core.internal.parser.XML10Names.isValidXML10Name(XML10Names.java:588)
at
org.eclipse.wst.xml.core.internal.parser.XML10Names.isValidXML10Name(XML10Names.java:271)
at
org.eclipse.wst.xml.core.internal.provisional.NameValidator.isValid(NameValidator.java:50)
at
org.eclipse.wst.xml.core.internal.document.DocumentImpl.isValidName(DocumentImpl.java:1015)
at
org.eclipse.wst.xml.core.internal.document.DocumentImpl.checkTagNameValidity(DocumentImpl.java:258)
at
org.eclipse.php.internal.core.documentModel.dom.DOMDocumentForPHP.createElement(DOMDocumentForPHP.java:44)
at
org.eclipse.wst.xml.core.internal.document.XMLModelParser.insertStartTag(XMLModelParser.java:1482)
at
org.eclipse.wst.xml.core.internal.document.XMLModelParser.insertStructuredDocumentRegion(XMLModelParser.java:1510)
at
org.eclipse.wst.xml.core.internal.document.XMLModelParser.replaceStructuredDocumentRegions(XMLModelParser.java:2354)
at
org.eclipse.wst.xml.core.internal.document.DOMModelImpl.handleRefresh(DOMModelImpl.java:524)
at
org.eclipse.wst.xml.core.internal.document.DOMModelImpl.nodesReplaced(DOMModelImpl.java:742)
at
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument._fireEvent(BasicStructuredDocument.java:600)
at
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.fireStructuredDocumentEvent(BasicStructuredDocument.java:1198)
at
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.internalReplaceText(BasicStructuredDocument.java:1979)
at
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.replaceText(BasicStructuredDocument.java:2423)
at
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.replaceText(BasicStructuredDocument.java:2408)
at
org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.access$2(JobSafeStructuredDocument.java:1)
at
org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument$3.run(JobSafeStructuredDocument.java:141)
at
org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at
org.eclipse.wst.sse.ui.EditorExecutionContext.execute(EditorExecutionContext.java:149)
at
org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.replaceText(JobSafeStructuredDocument.java:144)
at
org.eclipse.wst.sse.ui.internal.StructuredDocumentToTextAdapter.replaceTextRange(StructuredDocumentToTextAdapter.java:1187)
at
org.eclipse.swt.custom.StyledText.modifyContent(StyledText.java:7180)
at
org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:7994)
at
org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2456)
at
org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:5911)
at
org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:5941)
at
org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:5635)
at
org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1282)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1267)
at
org.eclipse.swt.widgets.Widget.sendIMKeyEvent(Widget.java:1344)
at
org.eclipse.swt.widgets.Control.gtk_commit(Control.java:2840)
at
org.eclipse.swt.widgets.Canvas.gtk_commit(Canvas.java:160)
at
org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1733)
at
org.eclipse.swt.widgets.Control.windowProc(Control.java:5016)
at
org.eclipse.swt.widgets.Display.windowProc(Display.java:4408)
at
org.eclipse.swt.internal.gtk.OS._gtk_im_context_filter_keypress(Native Method) at
org.eclipse.swt.internal.gtk.OS.gtk_im_context_filter_keypress(OS.java:7793) at
org.eclipse.swt.widgets.Control.filterKey(Control.java:2250)
at
org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3012)
at
org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:734)
at
org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1743)
at
org.eclipse.swt.widgets.Control.windowProc(Control.java:5016)
at
org.eclipse.swt.widgets.Display.windowProc(Display.java:4408)
at
org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native
Method) at
org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:8394)
at
org.eclipse.swt.widgets.Display.eventProc(Display.java:1245)
at
org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native
Method) at
org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2258)
at
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3207)
at
org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
at
org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
at
org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
at
org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at
java.lang.reflect.Method.invoke(Method.java:616)
at
org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at
org.eclipse.equinox.launcher.Main.run(Main.java:1410)

eclipse.buildId=I20110613-1736
java.version=1.6.0_22 java.vendor=Sun
Microsystems Inc. BootLoader
constants: OS=linux, ARCH=x86, WS=gtk,
NL=en_US Command-line arguments: -os
linux -ws gtk -arch x86