**UPDATE** Problem resolved. Connection now goes from EZproxy into Books 24×7 site on 1st attempt. Now go read Cocoa Programming for Mac OS X for Dummies.
If you have tried to connect to a Books 24×7 title lately, you may have noticed a small glitch. On the first attempt through EZproxy (where you enter your UBCcard Barcode and PIN), you land on the “Blue Box” log in screen for Books 24×7. Don’t panic or try to figure out what to enter. Use your browsers Back button and enter EZproxy again. On the second attempt (as long as you don’t clear you cookies) you will connect to your book.
Why is this? Top people are working on that question right now. Stay tuned.