diff --git a/mmgen/node_tools/BlocksInfo.py b/mmgen/node_tools/BlocksInfo.py
index 55e2b7a..c25d1a2 100644
--- a/mmgen/node_tools/BlocksInfo.py
+++ b/mmgen/node_tools/BlocksInfo.py
@@ -242,7 +242,7 @@ class BlocksInfo:
 			yield (ls + self.fields[name].fs.replace(':',repl) + rs)
 
 	def conv_blkspec(self,arg):
-		if arg == 'cur':
+		if str(arg).lower() == 'cur':
 			return self.tip
 		elif is_int(arg):
 			if int(arg) < 0:
diff --git a/mmnode-blocks-info b/mmnode-blocks-info
index e7a79fa..2a8c9c6 100755
--- a/mmnode-blocks-info
+++ b/mmnode-blocks-info
@@ -34,9 +34,9 @@ opts_data = {
 	],
 	'text': {
 		'desc':    'Display information about a block or range of blocks',
-		'usage':   '[opts] blocknum [blocknum ...] | blocknum-blocknum[+step] | [blocknum|-nBlocks]+nBlocks[+step]',
+		'usage':   '[opts] blocknum ... | blocknum-blocknum[+step] | [blocknum|-nBlocks]+nBlocks[+step]',
 		'usage2': [
-			'[opts] blocknum [blocknum ...]',
+			'[opts] blocknum ...',
 			'[opts] blocknum-blocknum[+step]',
 			'[opts] [blocknum|-nBlocks]+nBlocks[+step]',
 		],
@@ -116,14 +116,14 @@ EXAMPLES:
     Display only range stats for the last ten blocks:
     $ {p} -o none -s range +10
 
-    Display data for the last ten blocks, skipping 'size' and 'subsidy'
-    fields and stats:
+    Display data for the last ten blocks, omitting the 'size' and 'subsidy'
+    fields from the defaults and skipping stats:
     $ {p} -o -size,subsidy -s none +10
 
     Display all fields and stats for the last ten blocks:
     $ {p} -o all -s all +10
 
-    Same as above, but display only relevant fields:
+    Same as above, but display only fields relating to stats:
     $ {p} -o none -s all -f +10
 
     Same as above, but display stats only:
diff --git a/test/unit_tests_d/nt_BlocksInfo.py b/test/unit_tests_d/nt_BlocksInfo.py
index ea10655..96b7299 100755
--- a/test/unit_tests_d/nt_BlocksInfo.py
+++ b/test/unit_tests_d/nt_BlocksInfo.py
@@ -9,7 +9,7 @@ from mmgen.exception import *
 from mmgen.node_tools.BlocksInfo import BlocksInfo
 
 tip = 50000
-vecs = (
+range_vecs = (
 	#                  First     Last FromTip nBlocks Step    First      Last    BlockList
 	( (),              (),                                    (tip,      tip,    None) ),
 	( (199,2,37),      (),                                    (None,     None,   [199,2,37]) ),
@@ -36,8 +36,8 @@ vecs = (
 	( '-10+11',        (tip-10,   tip,    10,   11,   None),  (tip-10,   tip,    None) ),
 	( '-10+11+2',      (tip-10,   tip,    10,   11,   2   ),  (tip-10,   tip,    list(range(tip-10,tip+1,2))) ),
 
-	( 'cur',           (tip,      tip,    None, None, None),  (tip,      tip,    None) ),
-	( 'cur-cur',       (tip,      tip,    None, None, None),  (tip,      tip,    None) ),
+	( 'cUr',           (tip,      tip,    None, None, None),  (tip,      tip,    None) ),
+	( 'cur-cUR',       (tip,      tip,    None, None, None),  (tip,      tip,    None) ),
 	( '0-cur',         (0,        tip,    None, None, None),  (0,        tip,    None) ),
 	(f'{tip-1}-cur',   (tip-1,    tip,    None, None, None),  (tip-1,    tip,    None) ),
 	( '0-cur+3000',    (0,        tip,    None, None, 3000 ), (0,        tip,    list(range(0,tip+1,3000))) ),
@@ -57,7 +57,7 @@ class dummyOpt:
 
 class unit_tests:
 
-	def rangespec(self,name,ut):
+	def parse_rangespec(self,name,ut):
 
 		b = BlocksInfo(0,dummyOpt(),dummyRPC())
 
@@ -66,7 +66,7 @@ class unit_tests:
 			vmsg(f'{spec:13} => {BlocksInfo.range_data(*chk)}')
 			assert ret == chk, f'{ret} != {chk}'
 
-		for vec in vecs:
+		for vec in range_vecs:
 			if vec[1]:
 				test(*vec)
 
@@ -80,7 +80,7 @@ class unit_tests:
 			vmsg('{:13} => {}'.format(repr(spec) if type(spec) == tuple else spec,chk))
 			assert ret == chk, f'{ret} != {chk}'
 
-		for vec in vecs:
+		for vec in range_vecs:
 			test(*vec)
 
 		return True