Hi there,
You can report issues with your Premium Theme to the Premium Themes forum where it will be reviewed directly by the theme's author:
http://premium-themes.forums.wordpress.com/forum/standard
In this case, the issue was already reported by several other users of the Standard theme, and a fix is in progress:
http://premium-themes.forums.wordpress.com/topic/removing-header-text?replies=23
Best!