[Inkscape-user] text and snapping to guide lines

I have a question concerning the way text objects work with guide lines. It seems that when I position text objects to a guide line they "snap" to either the top of the text or the bottom of the text. The problem I have is when trying to line up headings in a form I am creating the snapping action doesn't take into account letters with descenders like Q, q. g, j, y, etc. but set the descenders againest the guide line and not the body of the letter.

How do you turn off the snapping action?

tj