Redcar redcar

I create new file using the right-click menu: File -> New and sometimes when I save the file Redcar crashes:

org.eclipse.swt.SWT:-1:in error': java.lang.IllegalArgumentException: Index out of bounds (NativeException) from org.eclipse.swt.SWT:-1:inerror' from org.eclipse.swt.SWT:-1:in error' from org.eclipse.swt.custom.StyledText:-1:ingetOffsetAtLine' from com/redcareditor/mate/MateText.java:542:in getHoverInfo' from org/eclipse/jface/text/source/AnnotationBarHoverManager.java:382:incomputeInformation' from org/eclipse/jface/text/AbstractInformationControlManager.java:1120:in doShowInformation' from org/eclipse/jface/text/AbstractHoverInformationControlManager.java:519:inmouseHover' from org.eclipse.swt.widgets.TypedListener:-1:in handleEvent' from org.eclipse.swt.widgets.EventTable:-1:insendEvent' from org.eclipse.swt.widgets.Widget:-1:in sendEvent' from org.eclipse.swt.widgets.Display:-1:inrunDeferredEvents' from org.eclipse.swt.widgets.Display:-1:in readAndDispatch' from /home/mitko/.rvm/gems/ruby-1.9.2-p136/gems/redcar-0.10/plugins/swt/lib/swt/event_loop.rb:13:instart' from /home/mitko/.rvm/gems/ruby-1.9.2-p136/gems/redcar-0.10/plugins/core/lib/core/gui.rb:39:in start' from /home/mitko/.rvm/gems/ruby-1.9.2-p136/gems/redcar-0.10/lib/redcar.rb:184:inpump' from /home/mitko/.rvm/gems/ruby-1.9.2-p136/gems/redcar-0.10/bin/redcar:30

I'm using Redcar 0.10 with rvm/1.9.2-p136 on Xubuntu 10.10 running in VirtualBox.