libqt-dev and libqt3-dev: can they coexist?

[John Spray <jcs116@york.ac.uk>]

Hello,

(Unstable, most recent packages)
I have been trying to install qt 2.x headers in order to complete a 
compilation on some qt 2.3 based software.  I have libqt2, libqt3 and 
libqt3-dev installed and functioning, but cannot install libqt-dev:
libqt-dev depends on libpng2-dev, while libqt3-dev depends on 
libpng12-dev.  It appears that it is the libpng packages that won't 
coexist.  apt-get wants to remove libpng12-dev and libqt3-dev and 
install libpng2-dev in order to install libqt-dev.

Any advice appreciated: I have little in-depth knowledge of debian 
package management.

Regards,
John Spray
(jcs116 at york.ac.uk)