Problem with WPMUDEV SEO (duplicated Site Title)

Hi,

I've just done a fresh new install (WP 3.1.1, multiste with subfolders, local install) with the WPMU DEV SEO plugin (I've tested both 1.0.5 and last 1.0.6 versions). No other plugins installed.

1. When the plugin is not activated:

1.1. On the main site (Twenty Ten with default content and settings) :

Title: Test Worpdress multiste empty | Just another WordPress site

--> ("Test Worpdress multiste empty" is the "Site Title" entered in the General settings of mainsite)

1.2. On the subsite (Twenty Ten with default content and settings) :

Title: Subsite 01 | Just another Test Worpdress multiste empty Sites site

--> ("Subsite 01" is the "Site Title" entered in the General settings of subsite)

2. When the plugin is activated (1.0.6, with no custom title/description entered in the WPMUDEV SEO box):

2.1. On the main site:

Title: Test Worpdress multiste emptyTest Worpdress multiste empty | Just another WordPress site (Site title is duplicated)

2.2. On the subsite:

Title: Subsite 01Subsite 01 | Just another Test Worpdress multiste empty Sites site (Site title is duplicated)

I have the same problem on the default sample page created by WP. The "Site Title" is duplicated.

I have attached my settings WPMUDEV SEO (step 3) which are the default ones.

Any idea?