I got this error when i go to the Gallery Settings or Other Options and get them blank
[Mon Aug 19 16:06:15 2013] [warn] [client xx.x.xxx.xxx] mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 71 bytes) in /xxx/xxxxx/public_html/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/fs/class.fs.php on line 289
I fix this by setting memory_limit = 128M to the php.ini file of the virtualhost. My was set at 64M.
Now no blank pages for me.
Hope it helps