cscope: missing files or broken package deps

Ubuntu 10.10 on x86/64 (yes, it's old, but 11.04 is a disaster), fully updated as of 20110907.

When installing package cscope WITHOUT also installing cscope-el (emacs bindings):

sudo apt-get install cbrowser cscope
[sudo] password for stephan:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  cbrowser cscope
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 214kB of archives.
After this operation, 922kB of additional disk space will be used.
Get:1 http://de.archive.ubuntu.com/ubuntu/ maverick/universe cscope amd64 15.7a-3.1 [146kB]
Get:2 http://de.archive.ubuntu.com/ubuntu/ maverick/universe cbrowser all 0.8-7 [68.4kB]
Fetched 214kB in 0s (372kB/s)
Selecting previously deselected package cscope.
(Reading database ... 217957 files and directories currently installed.)
Unpacking cscope (from .../cscope_15.7a-3.1_amd64.deb) ...
Selecting previously deselected package cbrowser.
Unpacking cbrowser (from .../cbrowser_0.8-7_all.deb) ...
Processing triggers for man-db ...
Processing triggers for menu ...
Setting up cscope (15.7a-3.1) ...
install/cscope: Byte-compiling for emacs23
cp: cannot stat `xcscope.el': No such file or directory
>>Error occurred processing xcscope.el: File error (("Opening input file" "No such file or directory" "/usr/share/emacs23/site-lisp/cscope/xcscope.el"))
install/cscope: Byte-compiling for xemacs21
cp: cannot stat `xcscope.el': No such file or directory
Compiling /usr/share/xemacs21/site-lisp/cscope/xcscope.el...
>>Error occurred processing xcscope.el: Opening input file: No such file or directory, /usr/share/xemacs21/site-lisp/cscope/xcscope.el

Done
Setting up cbrowser (0.8-7) ...
Processing triggers for menu ...

However, if i remove cscope and install it together with cscope-el then this error does not appear:

sudo apt-get install cbrowser cscope cscope-el
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  cbrowser cscope cscope-el
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/251kB of archives.
After this operation, 1069kB of additional disk space will be used.
Selecting previously deselected package cscope.
(Reading database ... 217957 files and directories currently installed.)
Unpacking cscope (from .../cscope_15.7a-3.1_amd64.deb) ...
Selecting previously deselected package cbrowser.
Unpacking cbrowser (from .../cbrowser_0.8-7_all.deb) ...
Selecting previously deselected package cscope-el.
Unpacking cscope-el (from .../cscope-el_15.7a-3.1_all.deb) ...
Processing triggers for man-db ...
Processing triggers for menu ...
Setting up cscope (15.7a-3.1) ...
install/cscope: Byte-compiling for emacs23
Wrote /usr/share/emacs23/site-lisp/cscope/xcscope.elc
install/cscope: Byte-compiling for xemacs21
Compiling /usr/share/xemacs21/site-lisp/cscope/xcscope.el...
Wrote /usr/share/xemacs21/site-lisp/cscope/xcscope.elc
Done
Setting up cbrowser (0.8-7) ...
Setting up cscope-el (15.7a-3.1) ...
Processing triggers for menu ...