I installed the Google XML Sitemap generator plugin to my site and after I activated the plugin (without adding the required sitemap.xml and sitemap.xml.gz files to my server) my screen just went white. That is, the plugin page stopped working. I was able to delete the Google XML Sitemap plugin folder on my server and then the plugin page in my admin area started to work again.
After that I added another plugin, Google Analytics for WordPress and the same thing happened. After deleting the plugin folder everything started to work again as usual.
I have not attempted to add any other plugins as I assume the same thing will happen again.
I have WP 3.8.1 in Icelandic