I´m using the flattr-plugin in a WP-Multisite with small and with huge (>2000 posts and 1.000 pages) sites. Flattr is activated as network-plugin.
Flattr working in general, but in the huge site the WP-Dashboard needs up to some minutes to load the admin-pages. I´ve deactivated the flattr plugin and everything was ok.
I´ve activated about 24 plugins in the network and 8 in the site.
Has anybody a tip, how to resolve this?