It is Word 2003, and I believe it was a built in style that was modified. Not
sure where it came from actually.
In Word 2003 and earlier, if you are in the Format Style dialog, with
"Styles in use" selected, you can delete any style except Normal, Default
Paragraph Font, and any heading style that is listed. Built-in styles are
not actually deleted, but they are reset to the default Normal.dot
formatting. User-defined styles are actually deleted, and Normal style is
applied to any paragraphs formatted with those styles.

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Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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> It is Word 2003, and I believe it was a built in style that was modified. Not
> sure where it came from actually.
[quoted text clipped - 3 lines]
> > > The option is greyed out when I try to delete a style that's giving me
> > > problems. Any suggestions?