Everytime I download a new theme and put it in the wp-content/themes directory, the image of the theme does not appear. However the images of the pre-existing default themes do appear.
I download the themes then unzip using jzip then use filezilla ftp to put the folder in the wp-content/themes
The theme image appears blank. When I click on it, the entire wordpress blog goes blank and unusable.
Any ideas on why I suddenly cant import new themes ?