- Patch #826054 by grendzy: upgrade from Drupal 6.17 fails with integrity constraint violation: 1048 Column 'filename' cannot be null.

- Patch #826668 by Damien Tournoud: db_add_field() will not accept 'foreign keys' even though it is part of schema api.

- Patch #826104 by kiamlaluno: constructor for DrupalTestCase is reported to be the constructor for DrupalWebTestCase.

- Patch #725734 by casey, David_Rothstein, recidive, jpmckinney, aspilicious: overlay doesn't escape any page titles (residual cleanup).

- Patch #172755 by c960657, klausi: autocomplete triggered when switching fields, 'undefined' written to field.

#245990 follow-up by Pedro Lozano: Tell system_http_check() not to follow redirects to avoid false error notifications.

#551658 follow-up by pwolanin: Revert back to D6-style temporary folder logic to avoid various platform issues.

- Patch #743908 by David_Rothstein, casey, Gábor Hojtsy: skip overlay initialization if already done.

- Patch #768040 by jhodgdon, janusman, codycraven: truncate_utf8() only works for latin languages and drupal_substr() had a bug.

- Patch #520760 by sun, Berdir, Steven Merrill, David_Rothstein, Heine, duellj, catch: fixed SA-CORE-2009-007 user signature format.

- Patch #663126 by casey, seutje: active items in top level IA don't have the light gray background when overlay is enabled.

#799982 by tstoeckler, StuartJNCC: Fixed Updating D6 -> D7 fails if the D6 site has Date module applied.

#680992 by Berdir, catch, andypost, douggreen, mr.baileys: Fixed comments are added to search index without checking access.

#668640 by casey, aspilicious, et al: Re-implement Overlay without jQuery UI Dialog; massive performance improvement, helps address several critical issues.