provider is only a possible solution if the provides has the right

version (or none as we have no versioned provides in debian) and not
if the version of the provider matches

apt-pkg/depcache.cc

@@ -1164,7 +1164,7 @@ bool pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
 	    pkgCache::VerIterator V = Prv.OwnerVer();
 	    pkgCache::VerIterator Cand = PkgState[Prv.OwnerPkg()->ID].CandidateVerIter(*this);
 	    if (Cand.end() == true || V != Cand ||
-		VS().CheckDep(Cand.VerStr(), Start->CompareOp, Start.TargetVer()) == false)
+		VS().CheckDep(Prv.ProvideVersion(), Start->CompareOp, Start.TargetVer()) == false)
 	       continue;
 	    verlist.insert(Cand);
 	 }

debian/changelog

@@ -18,11 +18,14 @@ apt (0.9.3) unstable; urgency=low
     - clearly separate 'positive' and 'negative' dependencies and
       their upgrade-resolution tries in MarkInstall and especially don't
       treat Conflicts differently compared to Breaks here
+    - provider is only a possible solution if the provides has the right
+      version (or none as we have no versioned provides in debian) and not
+      if the version of the provider matches
   * edsp/edspsystem.cc:
     - check with RealFileExists for scenario file as otherwise a directory
       like one provided with RootDir triggers the usage of EDSP
 
- -- David Kalnischkies <kalnischkies@gmail.com>  Mon, 23 Apr 2012 19:32:29 +0200
+ -- David Kalnischkies <kalnischkies@gmail.com>  Mon, 23 Apr 2012 22:02:58 +0200
 
 apt (0.9.2) unstable; urgency=low