Drupal White Screen After Submitting

Here is something annoying that happened to me of late.  I was messing around with a template file trying to validate a feed for a particular newsreader.  All seemed to be going well until I made a blog post.  I wrote the post, clicked submit and then... WHITE SCREEN.  This was some time after I had made the modification so I failed to see the connection.

Everything worked as it was supposed to except for the post submit screen.  Never one to let things sit broken for two long, I went hunting for the source of my problem.  As it turns out, invalid characters including spaces where they shouldn't be are the frequent cause of Drupal white screens.  I checked my template file and sure enough I had some.  Once they were removed, everything worked as it was supposed to.

If you are having problems with white screens, check your template file located in the folder of the theme that you are using.  It just might have been corrupted somewhere along the line.

Source: ContractWebDevelopment