All of those errors are 100% expected given the specific API changes that have already been posted here:
http://www.wowinterface.com/forums/s...ad.php?t=43091
Once addon authors start testing/updating for the beta, they will publish a version that's actually meant for users (rather than authors themselves) to test on the beta server, and ask for feedback and bug reports. Until they start doing that, though, there's not really much point in loading random addons and posting forum threads with a bunch of random errors.
Finally, "error compilations" like this tend to be very annoying for addon authors to try to keep track of... if you're getting an error or other problem with an addon, the order of priority for reporting generally goes something like this:
+ Ticket tracker for the addon (awesome!)
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+ Comment page for the addon (good, but only if there's no ticket tracker)
+ Official forum thread for the addon (good, but only if there's no ticket tracker)
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+ Unofficial forum thread for the addon (okay, but if only if there's nothing better)
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+ New random forum thread (not very good, but okay if there's really nothing better)
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+ New random forum thread with multiple problems from multiple addons (bad)