I use template variables to control several configuration variations in my store iAP-swarms.
For example:
name %hostname%
organization %organization%
syslog-level info
%if %custom_variable_9%
terminal-access
%endif%
Today, I'm modifying an template for the last "standard" firmware revision to make a template for the "upgrade" we're preparing to deploy, and I get this when I try to save and apply:
Invalid variables in template: %guid%;%organization%;%if %custom_variable_9%;%clock_timezone%;%if %custom_variable_10%;%custom_variable_10%;%rf_band%;%password%;%ams_identity%;%allowed_aps%;%if %custom_variable_2%;%if %custom_variable_3%;%if %custom_variable_4%;%if %custom_variable_5%.
I didn't see anythin in the release notes about changes in the variable use, and the template edit-page appears to like my use - in that the templates are greyed-out or bolded when I use or disuse them.