... with no special error entryin the Eclipse .log file:

!ENTRY org.vssplugin 1 0 2008-05-14 12:12:13.879
!MESSAGE Status Updater Thread Refresh done. Took 86753 ms

But a Java VM crash dump in C:\Programme\Eclipse:

EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x705e2d78, pid=2020, tid=2236
...
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J  org.eclipse.swt.internal.ole.win32.COM.VtblCall(IIILorg/eclipse/swt/internal/ole/win32/GUID;IILorg/eclipse/swt/internal/ole/win32/DISPPARAMS;ILorg/eclipse/swt/internal/ole/win32/EXCEPINFO;[I)I
J  org.vssplugin.core.ole.OleAutomation.invoke(II[Lorg/vssplugin/core/ole/Variant;[ILorg/vssplugin/core/ole/Variant;)I
J  org.vssplugin.core.ole.OleAutomation.getProperty(I[Lorg/vssplugin/core/ole/Variant;)Lorg/vssplugin/core/ole/Variant;
J  org.vssplugin.core.olecommand.VSSDatabase.getItem(Ljava/lang/String;)Lcom/ms/vss/IVSSItem;
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
J  org.eclipse.core.internal.jobs.Worker.run()V
v  ~BufferBlob::StubRoutines (1)
...

This occurs every once in a while. Upgrading to newer JRE versions didn't help. It seems to be some problem in the VSS plugin for Eclipse.