When using the Access Control Transformer to create different left menus for different users, the new left menu entries do not appear after logging in until after a manual page refresh. The only temporary solution is to turn off the caching of the live area but this can't be used in production. Perhaps a solution would be to cache based on the user/group, but maybe someone has a better idea.
For solving this in Lenya 1.2, see: http://solprovider.com/lenya/cache For Lenya 1.3, this is integrated in the "cache" Module (available in the repository.) The concept is to only disable caching when logged in. We could implement personal caches, but that would become complicated and create tons of rarely needed files.