After extracting the munged lua scripts from stock common.lvl files for both v1.0 and v1.2 I have discovered that 10 out of 49 scripts are different file-sizes. I had this idea to compare them after realizing the force vote kick was a new feature added to 1.2 (vote kicks are controlled by the file ifs_mp_lobby.script). Attached is an archive with the munged scripts for both versions so you can compare them yourself.
Here is the list of common scripts that were updated from 1.0 to 1.2
error_popup
ifelem_buttonwindow
ifs_awardstats
ifs_mp_lobby
ifs_opt_mp
ifs_personalstats
ifs_teamstats
ifutil_mouse
interface_util
popup_busy
This same comparison can be done with shell.lvl but I am not as interested in the shell as common right now. If somebody wants to upload the 1.0 shell.lvl I could compare those munged scripts sometime to 1.2 shell.lvl