diff --git a/lisp/org.el b/lisp/org.el
index 0da000738..8dddf0295 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -4138,10 +4138,12 @@ A cell is of the format
 
 If SNIPPET-FLAG is non-nil, the package also needs to be included
 when compiling LaTeX snippets into images for inclusion into
-non-LaTeX output.  COMPILERS is a list of compilers that should
-include the package, see `org-latex-compiler'.  If the document
-compiler is not in the list, and the list is non-nil, the package
-will not be inserted in the final document.
+non-LaTeX output.
+
+COMPILERS is a list of compilers that should include the package,
+see `org-latex-compiler'.  If the document compiler is not in the
+list, and the list is non-nil, the package will not be inserted
+in the final document.
 
 A string will be inserted as-is in the header of the document."
   :group 'org-latex
@@ -4175,6 +4177,11 @@ SNIPPET-FLAG, when non-nil, indicates that this package is also
 needed when turning LaTeX snippets into images for inclusion into
 non-LaTeX output.
 
+COMPILERS is a list of compilers that should include the package,
+see `org-latex-compiler'.  If the document compiler is not in the
+list, and the list is non-nil, the package will not be inserted
+in the final document.
+
 A string will be inserted as-is in the header of the document.
 
 Make sure that you only list packages here which:
@@ -7640,22 +7647,25 @@ unconditionally."
 	  (member arg '((4) (16)))
 	  (and (not invisible-ok)
 	       (invisible-p (max (1- (point)) (point-min)))))
-      ;; Position point at the location of insertion.
-      (if (not level)			;before first headline
-	  (org-with-limited-levels (outline-next-heading))
-	;; Make sure we end up on a visible headline if INVISIBLE-OK
-	;; is nil.
-	(org-with-limited-levels (org-back-to-heading invisible-ok))
-	(cond ((equal arg '(16))
-	       (org-up-heading-safe)
-	       (org-end-of-subtree t t))
-	      (t
-	       (org-end-of-subtree t t))))
-      (unless (bolp) (insert "\n"))	;ensure final newline
+      ;; Position point at the location of insertion.  Make sure we
+      ;; end up on a visible headline if INVISIBLE-OK is nil.
+      (org-with-limited-levels
+       (if (not level) (outline-next-heading) ;before first headline
+	 (org-back-to-heading invisible-ok)
+	 (when (equal arg '(16)) (org-up-heading-safe))
+	 (org-end-of-subtree)))
+      (unless (bolp) (insert "\n"))
       (unless (and blank? (org-previous-line-empty-p))
 	(org-N-empty-lines-before-current (if blank? 1 0)))
-      (insert stars " \n")
-      (forward-char -1))
+      (insert stars " ")
+      (when (eobp) (save-excursion (insert "\n")))
+      ;; When INVISIBLE-OK is non-nil, ensure newly created headline
+      ;; is visible.
+      (unless invisible-ok
+	(pcase (get-char-property-and-overlay (point) 'invisible)
+	  (`(outline . ,o)
+	   (move-overlay o (overlay-start o) (line-end-position 0)))
+	  (_ nil))))
      ;; At a headline...
      ((org-at-heading-p)
       (cond ((bolp)
diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index ebb2b6e11..2d771671a 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -1440,26 +1440,21 @@ Return the new header."
 (defun org-latex--remove-packages (pkg-alist info)
   "Remove packages based on the current LaTeX compiler.
 
-If the fourth argument of an element is set in pkg-alist, and it
-is not a member of the LaTeX compiler of the document, the packages
-is removed.  See also `org-latex-compiler'.
+PKG-ALIST is a list of packages, as in `org-latex-packages-alist'
+and `org-latex-default-packages-alist'.  If the fourth argument
+of a package is neither nil nor a member of the LaTeX compiler
+associated to the document, the package is removed.
 
-Return modified pkg-alist."
+Return new list of packages."
   (let ((compiler (or (plist-get info :latex-compiler) "")))
-    (if (member-ignore-case compiler org-latex-compilers)
-	(delq nil
-	      (mapcar
-	       (lambda (pkg)
-		 (unless (and
-			  (listp pkg)
-			  (let ((third (nth 3 pkg)))
-			    (and third
-				 (not (member-ignore-case
-				       compiler
-				       (if (listp third) third (list third)))))))
-		   pkg))
-	       pkg-alist))
-      pkg-alist)))
+    (if (not (member-ignore-case compiler org-latex-compilers)) pkg-alist
+      (cl-remove-if-not
+       (lambda (package)
+	 (pcase package
+	   (`(,_ ,_ ,_ nil) t)
+	   (`(,_ ,_ ,_ ,compilers) (member-ignore-case compiler compilers))
+	   (_ t)))
+       pkg-alist))))
 
 (defun org-latex--find-verb-separator (s)
   "Return a character not used in string S.
@@ -2892,7 +2887,7 @@ contextual information."
 	   (listings (plist-get info :latex-listings)))
       (cond
        ;; Case 1.  No source fontification.
-       ((not listings)
+       ((or (not lang) (not listings))
 	(let* ((caption-str (org-latex--caption/label-string src-block info))
 	       (float-env
 		(cond ((string= "multicolumn" float)
diff --git a/lisp/ox.el b/lisp/ox.el
index 743fcd772..ad4942be0 100644
--- a/lisp/ox.el
+++ b/lisp/ox.el
@@ -2673,10 +2673,7 @@ The function assumes BUFFER's major mode is `org-mode'."
 				    (quote ,val))
 			      vars))))))
 	 ;; Whole buffer contents.
-	 (insert
-	  ,(org-with-wide-buffer
-	    (buffer-substring-no-properties
-	     (point-min) (point-max))))
+	 (insert ,(org-with-wide-buffer (buffer-string)))
 	 ;; Narrowing.
 	 ,(if (org-region-active-p)
 	      `(narrow-to-region ,(region-beginning) ,(region-end))