* apt-pkg/packagemanager.cc:

  - do not do lock-step configuration for a M-A:same package if it isn't
    unpacked yet in SmartConfigure and do not unpack a M-A:same package
    again in SmartUnPack if we have already configured it (LP: #1062503)

apt-pkg/packagemanager.cc

@@ -492,6 +492,7 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
 	   P.end() == false; P = Pkg.Group().NextPkg(P))
       {
 	 if (Pkg == P || List->IsFlag(P,pkgOrderList::Configured) == true ||
+	     List->IsFlag(P,pkgOrderList::UnPacked) == false ||
 	     Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
 	      (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
 	    continue;
@@ -877,6 +878,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
 	   P.end() == false; P = Pkg.Group().NextPkg(P))
       {
 	 if (P->CurrentVer != 0 || P == Pkg || List->IsFlag(P,pkgOrderList::UnPacked) == true ||
+	     List->IsFlag(P,pkgOrderList::Configured) == true ||
 	     Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
 	      (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
 	    continue;

debian/changelog

@@ -4,6 +4,12 @@ apt (0.9.7.7) UNRELEASED; urgency=low
   * Catalan (Jordi Mallach)
   * Drop a confusing non-breaking space. Closes: #691024
 
+  [ David Kalnischkies ]
+  * apt-pkg/packagemanager.cc:
+    - do not do lock-step configuration for a M-A:same package if it isn't
+      unpacked yet in SmartConfigure and do not unpack a M-A:same package
+      again in SmartUnPack if we have already configured it (LP: #1062503)
+
  -- Jordi Mallach <jordi@debian.org>  Thu, 18 Oct 2012 23:30:46 +0200
 
 apt (0.9.7.6) unstable; urgency=low