diff --git a/lib/controller/checks.py b/lib/controller/checks.py
index 20c0654d8..891a4c59f 100644
--- a/lib/controller/checks.py
+++ b/lib/controller/checks.py
@@ -265,7 +265,7 @@ def checkSqlInjection(place, parameter, value):
                     elif where == 3:
                         origValue = ""
 
-                    kb.pageTemplate = getPageTemplate(templatePayload, place)
+                    kb.pageTemplate, kb.errorIsNone = getPageTemplate(templatePayload, place)
 
                     # Forge request payload by prepending with boundary's
                     # prefix and appending the boundary's suffix to the
@@ -762,6 +762,7 @@ def checkConnection(suppressOutput=False):
     try:
         page, _ = Request.queryPage(content=True)
         kb.originalPage = kb.pageTemplate = page
+        kb.errorIsNone = not wasLastRequestDBMSError()
     except sqlmapConnectionException, errMsg:
         errMsg = getUnicode(errMsg)
         raise sqlmapConnectionException, errMsg
diff --git a/lib/core/common.py b/lib/core/common.py
index 99f9200f0..3e0e10a28 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -21,7 +21,6 @@ import urlparse
 import ntpath
 import posixpath
 import subprocess
-import threading
 
 from ConfigParser import DEFAULTSECT
 from ConfigParser import RawConfigParser
@@ -72,6 +71,7 @@ from lib.core.settings import DUMP_START_MARKER
 from lib.core.settings import DUMP_STOP_MARKER
 from lib.core.settings import MIN_TIME_RESPONSES
 from lib.core.settings import TIME_STDEV_COEFF
+from lib.core.threads import getCurrentThreadData
 
 class UnicodeRawConfigParser(RawConfigParser):
     """
@@ -115,17 +115,6 @@ class DynamicContentItem:
         self.lineContentAfter = lineContentAfter
 
 
-class ThreadData():
-    """
-    Represents thread independent data
-    """
-
-    def __init__(self):
-        self.lastErrorPage = None
-        self.lastQueryDuration = 0
-        self.lastRequestUID = 0
-        self.valueStack = []
-
 def paramToDict(place, parameters=None):
     """
     Split the parameters into names and values, check if these parameters
@@ -1544,19 +1533,6 @@ def longestCommonPrefix(*sequences):
 def commonFinderOnly(initial, sequence):
     return longestCommonPrefix(*filter(lambda x: x.startswith(initial), sequence))
 
-def getCurrentThreadUID():
-    return hash(threading.currentThread())
-
-def getCurrentThreadData():
-    """
-    Returns current thread's dependent data
-    """
-
-    threadUID = getCurrentThreadUID()
-    if threadUID not in kb.threadData:
-        kb.threadData[threadUID] = ThreadData()
-    return kb.threadData[threadUID]
-
 def pushValue(value):
     """
     Push value to the stack (thread dependent)
@@ -1856,7 +1832,7 @@ def initTechnique(technique=None):
     data = getTechniqueData(technique)
 
     if data:
-        kb.pageTemplate = getPageTemplate(data.templatePayload, kb.injection.place)
+        kb.pageTemplate, kb.errorIsNone = getPageTemplate(data.templatePayload, kb.injection.place)
         kb.matchRatio = data.matchRatio
     else:
         warnMsg = "there is no injection data available for technique "
diff --git a/lib/core/option.py b/lib/core/option.py
index 14408929c..f9016dd0a 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -37,7 +37,6 @@ from lib.core.common import readCachedFileContent
 from lib.core.common import readInput
 from lib.core.common import runningAsAdmin
 from lib.core.common import sanitizeStr
-from lib.core.common import ThreadData
 from lib.core.common import UnicodeRawConfigParser
 from lib.core.data import conf
 from lib.core.data import kb
@@ -1147,6 +1146,7 @@ def __setKnowledgeBaseAttributes(flushAll=True):
     kb.docRoot         = None
     kb.dynamicMarkings = []
     kb.endDetection    = False
+    kb.errorIsNone     = True
     kb.formNames       = []
     kb.headersCount    = 0
     kb.headersFp       = {}
diff --git a/lib/core/threads.py b/lib/core/threads.py
new file mode 100644
index 000000000..697a1d18f
--- /dev/null
+++ b/lib/core/threads.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+
+"""
+$Id: unescaper.py 2635 2010-12-10 10:52:55Z inquisb $
+
+Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
+See the file 'doc/COPYING' for copying permission
+"""
+
+import threading
+
+from lib.core.data import kb
+
+class ThreadData():
+    """
+    Represents thread independent data
+    """
+
+    def __init__(self):
+        self.lastErrorPage = None
+        self.lastQueryDuration = 0
+        self.lastRequestUID = 0
+        self.valueStack = []
+
+def getCurrentThreadUID():
+    return hash(threading.currentThread())
+
+def getCurrentThreadData():
+    """
+    Returns current thread's dependent data
+    """
+
+    threadUID = getCurrentThreadUID()
+    if threadUID not in kb.threadData:
+        kb.threadData[threadUID] = ThreadData()
+    return kb.threadData[threadUID]
+
diff --git a/lib/parse/html.py b/lib/parse/html.py
index f4d2f6c01..22257209a 100644
--- a/lib/parse/html.py
+++ b/lib/parse/html.py
@@ -12,11 +12,11 @@ import re
 from xml.sax.handler import ContentHandler
 
 from lib.core.common import checkFile
-from lib.core.common import getCurrentThreadData
 from lib.core.common import parseXmlFile
 from lib.core.common import sanitizeStr
 from lib.core.data import kb
 from lib.core.data import paths
+from lib.core.threads import getCurrentThreadData
 
 class htmlHandler(ContentHandler):
     """
@@ -59,6 +59,9 @@ def htmlParser(page):
     parseXmlFile(xmlfile, handler)
 
     if handler.dbms and handler.dbms not in kb.htmlFp:
+        kb.lastParserStatus = handler.dbms
         kb.htmlFp.append(handler.dbms)
+    else:
+        kb.lastParserStatus = None
 
     return handler.dbms
diff --git a/lib/request/comparison.py b/lib/request/comparison.py
index dac1882e8..054a8de6a 100644
--- a/lib/request/comparison.py
+++ b/lib/request/comparison.py
@@ -58,7 +58,7 @@ def comparison(page, headers=None, getSeqMatcher=False, pageLength=None):
             return re.search(conf.regexp, page, re.I | re.M) is not None
 
         # In case of an DBMS error page return None
-        if wasLastRequestDBMSError():
+        if kb.errorIsNone and wasLastRequestDBMSError():
             return None
 
         # Dynamic content lines to be excluded before comparison
diff --git a/lib/request/connect.py b/lib/request/connect.py
index d777eb59c..f66e313fc 100644
--- a/lib/request/connect.py
+++ b/lib/request/connect.py
@@ -40,6 +40,7 @@ from lib.core.enums import PLACE
 from lib.core.exception import sqlmapConnectionException
 from lib.core.exception import sqlmapSyntaxException
 from lib.core.settings import MIN_TIME_RESPONSES
+from lib.core.threads import getCurrentThreadData
 from lib.request.basic import decodePage
 from lib.request.basic import forgeHeaders
 from lib.request.basic import parseResponse
diff --git a/lib/request/templates.py b/lib/request/templates.py
index 84bdfc1db..508488af7 100644
--- a/lib/request/templates.py
+++ b/lib/request/templates.py
@@ -13,11 +13,12 @@ from lib.core.data import kb
 from lib.request.connect import Connect as Request
 
 def getPageTemplate(payload, place):
-    retVal = kb.originalPage
+    retVal = kb.originalPage, kb.errorIsNone
 
     if payload and place:
         if (payload, place) not in kb.pageTemplates:
-            kb.pageTemplates[(payload, place)], _ = Request.queryPage(payload, place, content=True)
+            page, _ = Request.queryPage(payload, place, content=True)
+            kb.pageTemplates[(payload, place)] = (page, kb.lastParserStatus is None)
 
         retVal = kb.pageTemplates[(payload, place)]
 
diff --git a/plugins/dbms/access/fingerprint.py b/plugins/dbms/access/fingerprint.py
index 218994423..8f314518e 100644
--- a/plugins/dbms/access/fingerprint.py
+++ b/plugins/dbms/access/fingerprint.py
@@ -24,6 +24,7 @@ from lib.core.enums import DBMS
 from lib.core.session import setDbms
 from lib.core.settings import ACCESS_ALIASES
 from lib.core.settings import METADB_SUFFIX
+from lib.core.threads import getCurrentThreadData
 from lib.request import inject
 from lib.request.connect import Connect as Request