I think this is actually Zope's bug - if I'm not mistaken, the TinyTables product uses the Results class provided in lib/python/Shared/DC/ZRDB/Results.py, which would make it subject to breaking in the same way that SQLMethod results broke in the 2.2 alpha. I've included a copy of the note I sent to the folks reporting problems with SQLMethods that includes the patch you can use to verify that it fixes the problem for TinyTables as well:

That got me further, but it's still not all the way there: Traceback (innermost last): File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 224, in publish_module File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 189, in publish File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 175, in publish File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: index.html) File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: index.html) File /usr/Zope-2.2.0a1-src/lib/python/OFS/DTMLDocument.py, line 168, in __call__ (Object: index.html) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 500, in __call__ (Object: index.html) File /usr/Zope-2.2.0a1-src/lib/python/OFS/DTMLMethod.py, line 156, in __call__ (Object: standard_html_header) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 500, in __call__ (Object: standard_html_header) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_Util.py, line 333, in eval (Object: REQUEST.set('login',validateUser(_.None, _))) (Info: REQUEST) File <string>, line 0, in ? File /usr/Zope-2.2.0a1-src/lib/python/OFS/DTMLMethod.py, line 156, in __call__ (Object: validateUser) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 500, in __call__ (Object: validateUser) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_With.py, line 146, in render (Object: PARENTS[0].sessions) File /usr/Zope-2.2.0a1-src/lib/python/OFS/DTMLMethod.py, line 156, in __call__ (Object: getLogin) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 500, in __call__ (Object: getLogin) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_Util.py, line 333, in eval (Object: SESSION.has_key('login')) (Info: SESSION) File <string>, line 0, in ? File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_Util.py, line 140, in careful_getattr File /usr/Zope-2.2.0a1-src/lib/python/OFS/DTMLMethod.py, line 180, in validate (Object: index.html) File /usr/Zope-2.2.0a1-src/lib/python/AccessControl/SecurityManager.py, line 139, in validate File /usr/Zope-2.2.0a1-src/lib/python/AccessControl/ZopeSecurityPolicy.py, line 160, in validate Unauthorized: has_key So close! Many of my queries work, but a few break when trying to access a simple property or value (such as has_key). Some even break inconsistently, such as my getInstructorInfo query, which works fine inside a DTML document but doesn't work at all inside a Z SQL method. Here's its traceback: You are not authorized to access getInstructorInfo. Traceback (innermost last): File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 224, in publish_module File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 189, in publish File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 175, in publish File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: edit_instructors) File /usr/Zope-2.2.0a1-src/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: edit_instructors) File /usr/Zope-2.2.0a1-src/lib/python/OFS/DTMLDocument.py, line 168, in __call__ (Object: edit_instructors) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 500, in __call__ (Object: edit_instructors) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_With.py, line 146, in render (Object: REQUEST) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_Util.py, line 333, in eval (Object: db.updateInstructorInfo(login=login, name=name, email=email, phone=phone, office=office, homepage=homepage, password=password)) (Info: phone) File <string>, line 0, in ? File /usr/Zope-2.2.0a1-src/lib/python/Shared/DC/ZRDB/DA.py, line 432, in __call__ (Object: updateInstructorInfo) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 500, in __call__ (Object: <string>) File /usr/Zope-2.2.0a1-src/lib/python/DocumentTemplate/DT_Util.py, line 327, in eval (Object: getInstructorInfo(login=login)) (Info: getInstructorInfo) Unauthorized: (see above)