Merge branch '0.6.0.x' into 0.6.x

Conflicts:
	bitcoin-qt.pro
	doc/README
	doc/README_windows.txt
	share/setup.nsi
	src/bitcoinrpc.h
	src/db.h
	src/headers.h
	src/init.cpp
	src/main.cpp
	src/main.h
	src/noui.h
	src/qt/bitcoin.cpp
	src/qt/locale/bitcoin_en.ts
	src/qt/walletmodel.cpp
	src/script.cpp
	src/ui_interface.h
	src/util.cpp

src/bitcoinrpc.cpp

@@ -839,7 +839,8 @@ Value movecmd(const Array& params, bool fHelp)
         strComment = params[4].get_str();
 
     CWalletDB walletdb(pwalletMain->strWalletFile);
-    walletdb.TxnBegin();
+    if (!walletdb.TxnBegin())
+        throw JSONRPCError(-20, "database error");
 
     int64 nNow = GetAdjustedTime();
 
@@ -861,7 +862,8 @@ Value movecmd(const Array& params, bool fHelp)
     credit.strComment = strComment;
     walletdb.WriteAccountingEntry(credit);
 
-    walletdb.TxnCommit();
+    if (!walletdb.TxnCommit())
+        throw JSONRPCError(-20, "database error");
 
     return true;
 }