Of course you can do as per some other people gave you to go through the Database and fix it. But it can also break it if not done properly.

Before going into Database mode, I would suggest one thing that happened to me.

First make sure that you go in the settings of WordPress and make sure that the URLs are good... EVEN if they are good SAVE SETTINGS once more to make sure the settings is reflected everywhere.

By using plugins to move sites around those settings don't seems to reflect everywhere even if this information here is good.

Also I would suggest to go through most of your Settings (For example Permalinks) and Plugin Settings (For Example Polylang I had a problem with it since there is PATH information in it) and see if there is any relations with "PATH" if there is make sure they have the good information and SAVE THEM AGAIN even if they have the proper information.

Sometime to make sure the change takes effect... I put a wrong information save and add the proper information again and save again... The reason why I do that, I know some programmers that do no "save" the information if it was the same before and after editing this way your are sure the information is transferred properly.

Images give 404 after changing default domain
In the new Yahoo! mail I can select multiple checkboxes against my email subjects and press k to perform the action Mark as read. 

Is there a similar alternative in GMail?
