Dr. Carl Burch (the developer of Logisim) has reviewed the bug reports and feedback from the past week of use here in 61c.  Based on your comments he has created a new version of Logisim for us to work with.  You can use it on the instructional machines by typing:
         java -jar ~cs61c/bin/logisim-v20b3.jar

or you can snag it for home use from the Logisim Website.  When submitting bug reports in the future, please be sure to indicate what version of the software you found the problem in.

The list of changes in this version follows:

BUG FIXES

* The program could not save a project that imported other Logisim files.

* Wires did not properly merge when a wire was moved or removed
  using the Select tool.

* Undoing the deletion of items using the Select Tool did not work.

* Multi-bit constant values were improperly saved (as decimal rather than hex).


FEATURES

* Clicking a component with the Poke Tool or the Select tool also shows the attributes for that component.

* Clicking a wire with the Poke Tool shows that wire's current value.

* The attributes for a subcircuit include the subcircuit's name.

* The wiring tool now shows a ghost.

* The color associated with a ``1'' is not quite so irritatingly bright.