Also, in templates\default\header.tpl
LINE 5
<meta charset={$lang.CHARSET}" />
SHOULD BE CHANGED TO
<meta charset="{$lang.CHARSET}" />
I also noticed that while smarty version 2.6.25-dev is now being used in UBBT v7.5.8 (as an upgrade from smarty 2.6.19 in UBBT v7.5.7) I have been using smarty 2.6.27 RELEASE without problems.
Should an older development version really be used instead of a newer, release version?
As of October 1, 2013, the current version of smarty v2 is actually 2.6.28. I haven't upgraded to it yet, but just comparing the code to 2.6.27, the change is only 3 lines of code in one file, "Smarty_Compiler.class.php."