Not sure if these are all related, so please create separate issues if separate.
They all started to happen after i updated from svn today:

ORM Explorer gives me:
java.lang.ClassNotFoundException: org.jboss.tools.hibernate.view.views.ExplorerClass
at java.lang.ClassLoader.findClass(ClassLoader.java:358)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:429)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:369)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:357)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
Before it would show "No hibernate projects found" or the list of hibernate projects.

Open a components.xml file and I get:
java.lang.IllegalArgumentException: Argument not valid
at org.eclipse.swt.SWT.error(SWT.java:3531)
at org.eclipse.swt.SWT.error(SWT.java:3465)
at org.eclipse.swt.SWT.error(SWT.java:3436)
at org.eclipse.swt.graphics.GC.setFont(GC.java:3162)
at org.eclipse.ui.forms.widgets.ExpandableComposite$ExpandableLayout.layout(ExpandableComposite.java:280)
at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1311)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:876)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:841)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:811)
at org.jboss.tools.common.editor.form.SampleErrorForm$ErrorLayout.layout(SampleErrorForm.java:359)
at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1311)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:876)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:841)
at org.jboss.tools.common.editor.form.SampleErrorForm.setVisible(SampleErrorForm.java:106)
at org.jboss.tools.common.editor.TreeFormPage.doErrorMode(TreeFormPage.java:295)
at org.jboss.tools.common.editor.TreeFormPage.setErrorMode(TreeFormPage.java:287)

Right click on files in Project Explorer doesn't show any menu's anymore (not even on plain Dynamic web project).
See attached screenshot - rightclick on test.txt doesn't do anything, same with web.xml. Right click on Seam components sometimes give an "Open" menu.