[Mark N]

Try as I might, I was unable to get Smarty3 to work - it just broke too many things in third party modules. And talking to the authors of the modules, the fact that this is, in a lot of ways, an "optional" upgrade, supporting what will amount to two different branches of X-Cart (but with the same version numbers) was daunting to say the least.

I think ultimately they will need to officially move to Smarty3 before this sort of thing will get worked out. 4.5.0 would have probably been the logical point to do that, but what ya gonna do...