adesklets crash on start of any applet

[cobra1809]

Binary package hint: adesklets

Proc : AMD Athlon 64 X2 4200+ (2200 Mhz)
Mem : 2 Go

OS : Ubuntu 9.04 (x64)
adesklets : 0.6.1-4 build 1
Python : 2.6

When I launch any applet (i.e. SystemMonitor or weatherforecast), here is the error :

Traceback (most recent call last):
  File "./weatherforecast.py", line 42, in <module>
    import adesklets
  File "/usr/lib/python2.6/dist-packages/adesklets/__init__.py", line 30, in <module>
    from adesklets.initializer import _Initializer
  File "/usr/lib/python2.6/dist-packages/adesklets/initializer.py", line 13, in <module>
    from children_handler import _Children_handler
  File "/usr/lib/python2.6/dist-packages/adesklets/children_handler.py", line 5, in <module>
    from signal_handler import Signal_handler
  File "/usr/lib/python2.6/dist-packages/adesklets/signal_handler.py", line 12, in <module>
    class Signal_handler:
  File "/usr/lib/python2.6/dist-packages/adesklets/signal_handler.py", line 20, in Signal_handler
    func = posix_signal.signal
AttributeError: 'module' object has no attribute 'signal'

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