Just to answer the question above..
No.. the webapp was not running when I was adding the jars.... and 1) No I was not using a new version of the module (which would bu default cause a bootstrap of the files, right?) and 2) No, they have been modified in the jar, but the webapp by default works with the previous state of the files in the file system, until a newer version of the file is supplied (like via redeployment or adding a new version). This probably confirms your suspectoins.. 
I will try your new deployment page, and provide feedback tommorow... and looking forward to try the new modules as well.. 
And, if you could provide more info on the module/update mechanizam
Regards,
Vasko
Integrated in
magnolia_main-trunk #259
/
MAGNOLIA-2245: removed DeploymentUtilsPage - moved i18n reload tool to DevelopmentUtilsPage(+ slight improvement of the devutilspages)
MAGNOLIA-2245: removed DeploymentUtilsPage - moved i18n reload tool to DevelopmentUtilsPage (+ slight improvement of the devutilspages)