I have had another thread going on this issue, but after finding multiple posts at Wordpress MU and on different forums on the internet (Google is our friend, remember?), I have concluded that this problem is not limited to my site. The number of identical instances of the problem indicate to me that it is a WPMU problem, and I am hoping someone can help find a solution.
What I, and the others, are seeing, when viewing the source after WPMU loads in a new browser is ...
<style type="text/css" media="screen"> @import url(http://somedomain.com/wp-content/themes//style.css); </style>
Notice the two slashes with no data inserted between them (//). What we should be seeing is
<style type="text/css" media="screen"> @import url(http://somedomain.com/wp-content/themes/theme-name/style.css); </style>
Where the theme name is inserted between the two slashes. Refreshing the page loads the correct information (the second example, above) and the page renders properly.
This happens across all themes, single site WP style themes, as well as newer themes like WP-Nelo and WP-Triden.
I am a "non-coder" but it appears to me that this could only be a problem with the WPMU core, and possibly either some problem from the original installation, or the core code.
The most useful post I have seen among the problems listed on the internet was where one user was able to edit their database, but for some reason, my installation does not have the table he edited. He edited Table: wp_2_options. I have Table: wp_1_options, Table: wp_3_options and Table: wp_4_options, but no Table: wp_2_options.
I would appreciate some help on this matter, or direction toward a source of help. I do not want to hire an outside developer as this will not solve the problem permanently. One update and the problem will return.