[Eric] Eric 4.3.0: new help tab produces exception

[Robert Withrow]

I just uninstalled an older version of Eric4, installed the new version,
then started the tray applet like this:

$ eric4-tray &

I then start the ide with the right context click on the tray icon.  I
then click on the help button which starts the help view (but doesn't
display anything... is that correct?).

When I click on the "open new tab" button I get (with redactions for
personal info):

Warning:
An unhandled exception occurred. Please report the problem
using the error reporting dialog or via email to
<eric4-bugs at die-offenbachs.de>.
A log has been written to "<place>eric4_error.log".
Error information:
--------------------------------------------------------------------------------
2009-02-15, 09:08:25
--------------------------------------------------------------------------------
<type 'exceptions.AttributeError'>:
'NoneType' object has no attribute 'setEnabled'
--------------------------------------------------------------------------------
File "/usr/lib/python2.5/site-packages/eric4/Helpviewer/HelpWindow.py",
line 1291, in __currentChanged
self.printPreviewAct.setEnabled(hasattr(cb, 'print_'))
--------------------------------------------------------------------------------
Version Numbers:
Python 2.5.2
Qt 4.3.4
PyQt4 4.3.3
sip 4.7.3
QScintilla 2-snapshot-20070923
eric4 4.3.0 (r2852)
Platform: linux2
2.5.2 (r252:60911, Jul 31 2008, 17:28:52)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)]
--------------------------------------------------------------------------------
Plugins Version Numbers:
PluginAbout 4.3.0
PluginEricapi 4.3.0
PluginEricdoc 4.3.0
PluginProjectDjango 2.0.1
PluginSyntaxChecker 4.2.0
PluginTabnanny 4.2.0
PluginVcsPySvn 4.3.0
PluginVcsSubversion 4.3.0
PluginVmListspace 4.2.0
PluginVmMdiArea 1.0.0
PluginVmTabview 4.3.0
PluginVmWorkspace 4.2.0
PluginWizardPyRegExp 4.2.0
PluginWizardQColorDialog 4.2.0
PluginWizardQFileDialog 4.2.0
PluginWizardQFontDialog 4.2.0
PluginWizardQInputDialog 4.2.0
PluginWizardQMessageBox 4.2.0
PluginWizardQRegExp 4.2.0
--------------------------------------------------------------------------------
Distribution Info:
/etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu 8.04.1"

-- 
Robert Withrow, R.W. Withrow Associates, Swampscott, MA, USA