add this line right under <?php

define('DISABLE_HOOKS', true);

Then disable vB Optimise 1.3.2 or change the option to File Cache

IRANCITY - Your issue seems to be with memcached and using vBulletins memcache datastore, not vB Optimise.

Installed it for 3.6.+ and it works. Although I can't see any numbers, I have noticed a huge difference in response. Thanks alot!

*Even motivated me to upgrade vB Advanced. :p*

had debug enabled and xcache installed, but i only noticed that pageload were slower when i had the mod enabled. without it load 0.4 seconds 59 queries and with mod enabled 0.8 seconds 57 queries

59 queries is ridiculous.

Reenabled and started taking a look at load times figured I could alwyas disable if the importing of plugins was an issue and found my load times are also longer with this module under xcache.

Has this issue been resolved?

SBlueman - I believe the issue is related to non vB 3.8 installs, although some vB 3.7 installs have said the vBAdvanced install is working, perhaps between one of the 3.7 versions code changed between vB shifting save_settings(). This is a default vB function so isn't really an issue with vB Optimise, all I can say is try upgrade your vB to the latest vB 3.7 install :)

maidos - Your forum is executing a lot of queries, the two that this mod reduces will barely impact your forum because it is nearly executing 60 altogether. You really need to drop mods on your forum that are adding so many queries.

I am receiving this error, like SBlueman, on vB 3.6.8 as well. You had mentioned fixing it in the next release...

andrewkhunn - If it was an issue with vB Optimise specifically I would fix it, but it's due to using an old vB version I'm afraid.