isearch+ provoces error when starting eshell

[Gregor Zattler]

Dear Emacs developers, users, Drew,

in emacs24 when isearch+ is loaded, starting eshell gives:

byte-code: Key sequence C-c C-c starts with non-prefix key C-c

and somehow freezes.  It's possible to give a `ls' command but
not twice.

Minimal example:
emacs-snapshot -Q -nw -l ~/.emacs.d/elpa/isearch+-20130513.1521/isearch+.el -f 
eshell

There is no problem with emacs23:
emacs23 -Q -nw -l ~/.emacs.d/elpa/isearch+-20130513.1521/isearch+.el -f eshell
works as expected.


I don't know which part is to blame for the error.  Debugging
this is beyond my skills. 

Is this something I should file a bug report for?  Where?

Thanks for your attention, Gregor