[TYPO3] 'if' problem

[John Angel]

Hi

'if' clause is making me problems...

The code below should display just the name if email doesn't exist. But, it 
always displays email anchor. Please help.

Regards
John


 # Render author & email
lib.author = TEXT
lib.author {
 dataWrap = page:author

 # ALWAYS WORKS!?
 if.isTrue.data = page:author_email
  dataWrap = <A href="mailto:{page:author_email}">{page:author}</A>
 if >
}