I write a plugin for multisite user management.
I've had a few users contact me about an issue being caused by W3 Total Cache. The problem is, W3 is overriding the return value of
get_option('blogname') such that it returns the name of the current blog, even when
switch_to_blog has been used to change the site internally.
You can see the code I'm referring to in the
msum_options() function here.
Can you please fix W3 Total Cache to support WordPress'