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Hi,
I have had those Smarty errors before. Here's what I suggest:
Update the Extended Profiles module,
Update the System Module,
Then check to see if there are any templates that need to be generated (Admin > Misc Tools > Templates). Any numbers in red indicate a template needs to be generated.
As for the PHP Notice: it's only a notice that something has not been defined. When you turn off PHP Debug, it won't show.
Good luck!
Dana