I can't easily post to my sites, and, when students post comments to some post I've made, they often get taken to a blank screen (using firefox).
I've done the basic troubleshooting that I've found on the web (eg clear cache/cookies, disable all plugins) to no avail.
The following steps illustrates what I do and the problem:
--In superadmin box in the dashboard I click on 'sites'.
--I click on 'edit' for one of my sites such as the groosp1 site. I have these settings shown:
----Domain http:// is: fle.mpls.k12.mn.us
----path is: /wpblogs/groosp1/
----I've got checked: Update siteurl and home as well.
----It has the incorrect siteurl: http://fle.mpls.k12.mn.us/wpblogs
----I scroll a ways down to the 'home' setting and it has the correct address: http://fle.mpls.k12.mn.us/wpblogs/groosp1/
--I update the siteurl to: http://fle.mpls.k12.mn.us/wpblogs/groosp1
--I scroll to the bottom and click 'update options'.
--Next, if I click on 'add post' at the top of this screen it will go to a post creation page BUT not for the correct site but instead has this address: http://fle.mpls.k12.mn.us/wpblogs/wp-admin/post-new.php (note the missing /groosp1 in the address). If I publish this post and view it I find it at the root blog page... http://fle.mpls.k12.mn.us/wpblogs/blog/2010/11/16/test5-post/. However,
--If I click on a link to the /groosp1 site, then click on 'site-admin', then click 'add post', create a post and post and view it, It works just find, creating a post on the groosp1 site.
--next I log out
--log back in
--go to superadmin box, again to to 'sites', click on 'edit' for the groosp1 site.
--and it has re-written the siteurl again back to the root site: http://fle.mpls.k12.mn.us/wpblogs
--and if I try to post a blog it will go to the site root, not the groosp1 site I was at.
I've worked many hours on getting a handle on problem, I'd appreciate any links or ideas to check!