diff --git a/gluon/contrib/markmin/markmin2latex.py b/gluon/contrib/markmin/markmin2latex.py
index 8f37e8bb..643e83d5 100755
--- a/gluon/contrib/markmin/markmin2latex.py
+++ b/gluon/contrib/markmin/markmin2latex.py
@@ -237,6 +237,7 @@ WRAPPER = """
 \\usepackage{graphicx}
 \\usepackage{grffile}
 \\usepackage[utf8x]{inputenc}
+\\usepackage{textgreek}
 \\definecolor{lg}{rgb}{0.9,0.9,0.9}
 \\definecolor{dg}{rgb}{0.3,0.3,0.3}
 \\def\\ft{\\small\\tt}
diff --git a/gluon/contrib/markmin/markmin2pdf.py b/gluon/contrib/markmin/markmin2pdf.py
index 7e3c2eec..299cb1dc 100644
--- a/gluon/contrib/markmin/markmin2pdf.py
+++ b/gluon/contrib/markmin/markmin2pdf.py
@@ -80,7 +80,7 @@ def latex2pdf(latex, pdflatex='pdflatex', passes=3):
             outfile.close()
         re_errors = re.compile('^\!(.*)$', re.M)
         re_warnings = re.compile('^LaTeX Warning\:(.*)$', re.M)
-        flog = open(logname)
+        flog = open(logname,encoding="utf-8")
         try:
             loglines = flog.read()
         finally:
diff --git a/gluon/tools.py b/gluon/tools.py
index aefebbc5..e6421b88 100644
--- a/gluon/tools.py
+++ b/gluon/tools.py
@@ -2638,9 +2638,7 @@ class Auth(AuthAPI):
                         # invalid login
                         session.flash = specific_error if self.settings.login_specify_error else self.messages.invalid_login
                         callback(onfail, None)
-                        if 'password' in request.post_vars:
-                            del request.post_vars['password']
-                        redirect(self.url(args=request.args, vars=request.vars),client_side=settings.client_side)
+                        redirect(self.url(args=request.args, vars=request.get_vars),client_side=settings.client_side)
 
             else:  # use a central authentication server
                 cas = settings.login_form