I have a multisite installation on one domain with 24 network blogs in sub-directories. I'm using the Sitewidetags plugin to pull post excerpts and thumbnails from the network sites onto the main blog. This seems to be working OK.
But I am experiencing three problems which may be related:
Firstly, when publishing/updating a post I frequently (but not always) get an error message telling me I have attempted to update a post which does not exist; I have to use the back button to return to the previous page. However, the post has been published normally when I check in a separate browser.
Secondly, when I update or make a new post, instead of returning the updated page in the admin I am often (but not all the time) switched to a completely different (apparently random) post in the main blog (the admin switches to the main blog also). The original post is published, however, and the thumbnail and post also pulled to the main blog OK.
I have tried switching off the Sitewidetags plugin, and a post can be updated normally (obviously not being pulled to the main blog), although as the fault is intermittent this is not yet conclusive.
Thirdly, but more rarely, when opening to the main blog home page, I experience a delay and then it flicks to a network blog home page url, which usually does not load completely. On refresh the correct home page is loaded.
The network runs off a litespeed hybrid server with 2GB RAM so there's no problem with resources. I have installed WP Total Cache network wide, but have not set any JS or CSS to be minified as I encountered some configuration issues. I use disk enhanced for the page cache, disk for minified, opcode for object cache and database cache, and browser cache is also activated. Memcached is available on the server but I have not implemented it in WP TC.
The theme used is Studiopress Genesis Lifestyle on all sites.
I am using Firefox and Chrome on Windows 7 and Vista. The server is in Chicago, we are running off cable in Sydney Australia.
Anyone experienced anything similar?