When installing s9y 1.6 in Portuguese I have noticed that the Portuguese two letter word abbreviation for Saturday in the calendar was coming out as "S?" when it should be "Sá". I tracked down this to a problem with the truncate function in Smarty which is not multibyte safe. The issue and a workaround can be found for instance at http://www.guyrutenberg.com/2007/12/04/ ... _truncate/
In my case the code was coming from /templates/bulletproof/plugin_calendar.tpl
Possibly other locales are affected. I have not fully checked.
Another related and very minor issue: Portuguese day of the week abbreviations with 2 letters are a bit weird as Wednesday and Thursday both end up as "Qu".
Possibly this is no longer present in the current code due to the adoption of Smarty 3.0. /templates/bulletproof/plugin_calendar.tpl is unchanged anyway.
João Palhoto Matos