I don't normally use the auto instal to create a database, preferring instead to do it manually - but on this occasion i used the auto instal function
so, i don't know if this is normal behaviour or not
but in the connection string, catalog= is created with the database name i chose during set up enclosed with " - ( this is not something I expect to do with a manual instal)
eg
<add name="NopSqlConnection" connectionString="Data Source=.\sqlexpress;Initial Catalog="1.9 beta";Integrated Security=True;Persist Security Info=False;MultipleActiveResultSets=True;Connect Timeout=120" />
The database itself is created without " ( ie just the name specified - in this case 1.9 beta )
and nopcommerce seems to run / perform normally even with this