Warning: mysqli_fetch_row() expects parameter 1 to be mysqli_re

Full message: Warning: mysqli_fetch_row() expects parameter 1 to be mysqli_result, boolean given in C:\wamp\www\Sjalosh250\libraries\joomla\database\database\mysqli.php.

I have installed Joomla 2.5.1. Any idea what is wrong here?
Thanks.

the same for me:
Warning: mysqli_fetch_row() expects parameter 1 to be mysqli_result, boolean given in /home/.../public_html/libraries/joomla/database/database/mysqli.php on line 469

any ideas?

Most likely loadResult() method (or similar loadColumn, etc) is called for incorrect or non-select query. MJ uses few loadResult, but queries in all cases are correct, so I don't know what exactly can lead to this warning.

Try to temporary disable MobileJoomla plugin to check that it's related to MJ.

i also have the same problem.
I'm using dreamhost. it gives the error messages on my Joomla 2.5.1 installation but not on Joomla 1.7 (same host, same settings)

it only shows after install. After you close installation window, everything works and have never seen this after that.

Yes it shows during installation only, I haven't seen any error messages after that