As a quick follow-up to the above: I found posts regarding an earlier version of Nextgen where this issue was discussed and apparently resolved by increasing the PHP Memory Limit.
I gave this a try, by adding
php_value memory_limit 256M
to my .htaccess file in the WP root directory
as well as adding the following row to my wp_config.php
define(“WP_MEMORY_LIMIT”, 256);
Unfortunately, to no avail.
For completeness, here are the updated server settings:
Operating System : Linux (64 Bit)
Server : Apache
Memory usage : 36.15 MByte
MYSQL Version : 5.1.43-nmm4-log
SQL Mode : Not set
PHP Version : 5.2.12-nmm2
PHP Safe Mode : Off
PHP Allow URL fopen : On
PHP Memory Limit : 256
PHP Max Upload Size : 200M
PHP Max Post Size : 200M
PCRE Backtracking Limit : 500000
PHP Max Script Execute Time : 300s
PHP Exif support : Yes ( V1.4 )
PHP IPTC support : Yes
PHP XML support : Yes
Graphic Library
GD Version : bundled (2.0.34 compatible)
FreeType Support : Yes
FreeType Linkage : with freetype
T1Lib Support : Yes
GIF Read Support : Yes
GIF Create Support : Yes
JPG Support : Yes
PNG Support : Yes
WBMP Support : Yes
XPM Support : Yes
XBM Support : Yes
JIS-mapped Japanese Font Support : No
Lastly, I am hosted by all-inkl.com – not sure if this may provide any further leads as to what causes the Add Gallery and Options pages to appear blank.
thanks.