[SOLVED] ATO/ Configure SEO: Option to Select Meta Title Tag Separator Not Working

Using Atahualpa 3.6.4 and WordPress 3.1.4.

Under ATO/ Configure SEO, there is an option to select among 13 different possible meta title tag separators, to separate the post name from the blog name in the meta title/ search engines.

The default is « -- but I would prefer to use No. 13, which is just a vertical line: |

However, no matter which of the 13 options I select and save, only the default tag appears in the meta title. Is there some place in one of the Theme files where this may be coded wrong? Where would I fix this, so that I can use the vertical line as the tag separator?

Many thanks!