Hi Bruce, I think I found the problem (I'm not sure how to fix it though). Here's how to recreate it:
Go to NetTalk Example 1 (browse and form, I think). On the MailBoxesFormControl, change the Text box, MAI:AutoResponseText to XHTML to a height of 8 rows and 100 characters. Change your tabs from Default (which isn't using tabs), to Layout type "Tabs" in the template, you'll see that no matter what width or height you put on the text box, it won't work right, it stays at 5 and 50 or something.