diff --git a/doc/wiki/using-mmgen/Tracking-and-spending-ordinary-Bitcoin-addresses.md b/doc/wiki/using-mmgen/Tracking-and-spending-ordinary-Bitcoin-addresses.md
new file mode 100644
index 00000000..ca0159b5
--- /dev/null
+++ b/doc/wiki/using-mmgen/Tracking-and-spending-ordinary-Bitcoin-addresses.md
@@ -0,0 +1,58 @@
+## Tracking and spending ordinary Bitcoin (non-MMGen) addresses
+
+While not recommended, it is possible to use MMGen to track and spend ordinary
+Bitcoin addresses too, i.e. addresses whose keys you control but which haven't
+been spent to your MMGen wallet.
+
+#### Import the Bitcoin addresses for tracking (online computer):
+
+Make a plain list of the addresses, one address per line, and import the list
+into the tracking wallet:
+
+		$ mmgen-addrimport --rescan -l my_existing_addrs
+
+NOTE: The '--rescan' option forces a rescan of the entire block chain, which is
+required for all addresses with existing balances.  The rescanning process is
+very slow, and Bitcoin Core unfortunately doesn't support rescanning in batch
+mode.  This is why you should always import new addresses into the tracking
+wallet *before* spending into them, whenever possible.
+
+#### Create a keylist file for signing transactions (online computer):
+
+To sign transactions that spend from the Bitcoin addresses you've imported, you
+need their corresponding private keys.
+
+If the key or keys in question are in a bitcoind wallet ('wallet.dat'), you can
+extract them to a keylist file using the 'bitcoin-cli dumpwallet' command:
+
+		$ bitcoin-cli dumpwallet my_secret.keys
+
+This will write the keylist file 'my_secret.keys' to your home directory (or
+maybe to your Bitcoin data directory, results may vary).  If you want it written
+to another location, provide an absolute path.
+
+Note that the keylist file lists your private keys in *unencrypted* form.
+Therefore, it should be backed up to a safe location—to a USB stick, say, or
+your offline computer.  After backing up, securely delete all copies of the list
+on your online computer using a utility such as 'wipe'.
+
+You may also create your own 'my_secret.keys' (or whatever you choose to call
+it) file in a plain text editor.  In it, just list the WIF-format keys
+corresponding to the addresses you've imported, one key per line.
+
+#### Sign a transaction using the keylist (offline computer):
+
+After creating a transaction that spends from one of your ordinary Bitcoin
+addresses, transfer the raw transaction file to your offline computer and sign
+it with the keylist file:
+
+		$ mmgen-txsign -k my_secret.keys F9DCBA[6.6].rawtx
+		...
+		Signed transaction written to file 'F9DCBA[6.6].sigtx'
+
+If your transaction also contains MMGen inputs, you'll need to provide a wallet
+for them too, listing it at the end of the command line, like this:
+
+		$ mmgen-txsign -k my_secret.keys F9DCBA[6.6].rawtx 89ABCDEF-76543210[256,3].mmdat
+
+That's it!  Your signed transaction is ready to broadcast.
diff --git a/mmgen/globalvars.py b/mmgen/globalvars.py
index 506108e2..ff6af3ef 100755
--- a/mmgen/globalvars.py
+++ b/mmgen/globalvars.py
@@ -46,13 +46,14 @@ bogus_wallet_data    = os.getenv('MMGEN_BOGUS_WALLET_DATA')
 disable_hold_protect = os.getenv('MMGEN_DISABLE_HOLD_PROTECT')
 color = (False,True)[sys.stdout.isatty() and not os.getenv('MMGEN_DISABLE_COLOR')]
 testnet = (False,True)[bool(os.getenv('MMGEN_TESTNET'))]
+testnet_name = 'testnet3'
 
 proj_name = 'MMGen'
 prog_name = os.path.basename(sys.argv[0])
 author    = 'Philemon'
 email     = '<mmgen-py@yandex.com>'
 Cdates    = '2013-2016'
-version   = '0.8.7rc1'
+version   = '0.8.7'
 
 required_opts = [
 	'quiet','verbose','debug','outdir','echo_passphrase','passwd_file',
diff --git a/mmgen/rpc.py b/mmgen/rpc.py
index 9bec6c4a..61f008ff 100755
--- a/mmgen/rpc.py
+++ b/mmgen/rpc.py
@@ -105,6 +105,7 @@ class BitcoinRPCConnection(object):
 		r = hc.getresponse() # returns HTTPResponse instance
 
 		if r.status != 200:
+			msgred('RPC Error: {} {}'.format(r.status,r.reason))
 			e1 = r.read()
 			try:
 				e2 = json.loads(e1)['error']['message']
diff --git a/mmgen/util.py b/mmgen/util.py
index f7da67dd..96055141 100755
--- a/mmgen/util.py
+++ b/mmgen/util.py
@@ -653,7 +653,7 @@ def get_bitcoind_cfg_options(cfg_keys):
 
 def get_bitcoind_auth_cookie():
 
-	f = os.path.join(get_homedir(), get_datadir(), '.cookie')
+	f = os.path.join(get_homedir(),get_datadir(),('',g.testnet_name)[g.testnet],'.cookie')
 
 	if file_is_readable(f):
 		return get_lines_from_file(f,'')[0]
diff --git a/setup.py b/setup.py
index baa235dd..268e9c28 100755
--- a/setup.py
+++ b/setup.py
@@ -45,7 +45,7 @@ module1 = Extension(
 setup(
 		name         = 'mmgen',
 		description  = 'A complete Bitcoin offline/online wallet solution for the command line',
-		version      = '0.8.7rc1',
+		version      = '0.8.7',
 		author       = 'Philemon',
 		author_email = 'mmgen-py@yandex.com',
 		url          = 'https://github.com/mmgen/mmgen',