Rewriting can cause some seo's problems?

Hi all,
i have a login problem in my portal (vbadvanced) , with url myforum.com and not www.myforum.com,
i have solved the problem adding these line in my htaccess:

Code:

Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^sfwupgrade\.it
RewriteRule ^(.*)$ http://www.sfwupgrade.it/$1 [R=permanent,L]

I already have a redirect on my htaccess:

Code:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^bbd3-it.com$ [OR]
RewriteCond %{HTTP_HOST} ^www.bbd3-it.com$
RewriteRule ^(.*)$ "http\:\/\/www\.sfwupgrade\.it\/" [R=301,L]

The up line can cause some indicizations vbseo problems?

Thanks

Hi Riccardo,

They shouldn't cause any problems, as they are all simply saying 'if not www. sfwupgrade .it , redirect to that domain'.