Installing problem on Joomla 1.6.1
Community Builder 1.4 :
mod_cblogin.zip
mod_comprofilermoderator
mod_comprofileronline.zip

There are 2 error messages :
Warning: constant() [function.constant]: Couldn't find constant JPATH_ in ...\libraries\joomla\installer\adapters\module.php on line 74
Warning: constant() [function.constant]: Couldn't find constant JPATH_ in ...\libraries\joomla\installer\adapters\module.php on line 76

For com_comprofiler.zip I've seen no messages

But after installation the modules are there seen so perhaps they work now ...

Will be there an update for the last Joomla version ?

I used a joomla french installation package
Now I used the original Joomla 1.6.1 install
There is only 1 error messages :
Warning: constant() [function.constant]: Couldn't find constant JPATH_ in ...\libraries\joomla\installer\adapters\module.php on line 74
But I can't understand how its possible that you can't replicate this
The error message appears 1 second and then the Joomla extension manager appears again and says that installation was successfull
So you have to take attention to this message that can be seen only a short time

I've found another post on an other forum on this issue and it seems to concern other extensions too :
Perhaps a Joomla issue !?
But after installation with the messages the modules are working fine so I can continue to work on ...

I think it may be a joomla 1.6 error. I get it aswell when installing modules, but it then goes to Successfully installed, and everything is functioning properly.