First- in case anyone else encoutners similar experiences with failures in updating a b10 installation to b11 and later, there are apparently TWO releases for b10 - the first b10 released in Feb 28 2011 and a second b10 released in Apr 22 2011. Not aware of the second b10 release, I was attempting to upgrade the first b10 to b11 and later. After upgrading b10 (Feb 28) to b10-1 (Apr 22), I am able to upgrade to b11 and later without the major errors and upgrade-aborts I've been experiencing. (a great relief!)
Unfortunately now however, even after a successful db update (no errors reported) all of the user-vsite URLs result in a "page not found" error - even after the first b10 -> b10-1 update. (and it doesnt get any better continuing with the others). Previously, in the working b10 (Feb 28 release) site, a user-vsite URL would be:
http://www.site.edu/username/firstname-lastname
...which would then then resolve to:
http://www.site.edu/username/home
...and the vsite would be displayed, with all links and URLs working as expected.
On the b10-1 (and later) upgraded site however, the default URL of "http://www.site.edu/username/firstname-lastname" does not change to "http://www.site.edu/username/home" and simply results in a "page not found" error. Additionally, manually entering the URL of "http://www.site.edu/username/home" results in the same error. Is there a setting I am missing, such as something that needs to be manually changed or reset after the upgrade process that will allow the user-vistes to be made accessible? Thank you in advance for any suggestions..
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solved!
in case anyone else encounters this, thanks to help from rbrandon it was isolated as an issue with the b11 update mechanism not applying updates to the "vsite_layout" update correctly. After manually changing the version of the "vsite_layout" update to 6001 (rather than use the defaults) and running the b11 update several times, the upgraded b10 site looked/worked as expected. thank you again for the help!