is_blog_installed gives errorneus result on moved database

[Kjeld Flarup]

I resently moved my blogs to a new database, but when I tried it out, on of the blogs wanted a new install. Of course I did not want to do an install and overwrite my blog.

I indirectly found the reason in is_blog_installed, which suppresses database errors. Thus I did not see this error.

SELECT command denied to user 'techblog'@'localhost' for table 'wp_options'

Of course it was my fault, but I virtually had to take the wordpress code apart to find out why my migration failed.

Of course this is not a big problem on new installs, but very likely to happen on moving databases.