Drupal - Blank Screen After Submit

Are you getting blank (white) screens in Drupal?

This is a common problem that begins to occur when you edit core/ theme/ template files and leave in invalid characters, or spaces where they shouldn't be.

A common place for this to occur is in your theme's template.php file.  Check to make sure there is no space after your ending ?>

If that doesn't fix it do a mass search for a space at the end of the last character for all your files.  Finally, back up your template.php file and complete delete it from your theme directory and see if you still get the blank screen.  If you don't, you've narrowed down the problem to your template.php file - maybe a function you ported over from an old site that no longer applies.

If that still doesn't solve your problem you may need to increase your php memory limits.  Consult your hosting provider for how to do this.