diff --git a/lisp/org-capture.el b/lisp/org-capture.el
index 6808c5718..965ccc3be 100644
--- a/lisp/org-capture.el
+++ b/lisp/org-capture.el
@@ -161,7 +161,7 @@ type         The type of entry.  Valid types are:
                            first plain list at the target
                            location.
                checkitem   a checkbox item.  This differs from the
-                           plain list item only is so far as it uses a
+                           plain list item only in so far as it uses a
                            different default template.
                table-line  a new line in the first table at target location.
                plain       text to be inserted as it is.
diff --git a/lisp/org-mobile.el b/lisp/org-mobile.el
index 3cfb2c677..84189937d 100644
--- a/lisp/org-mobile.el
+++ b/lisp/org-mobile.el
@@ -485,7 +485,7 @@ agenda view showing the flagged items."
 		     (concat (shell-quote-argument org-mobile-checksum-binary)
 			     " "
 			     (shell-quote-argument (expand-file-name file)))))
-	(when (string-match "[a-fA-F0-9]\\{30,40\\}" check)
+	(when (string-match "[[:xdigit:]]\\{30,40\\}" check)
 	  (push (cons link-name (match-string 0 check))
 		org-mobile-checksum-files))))
 
@@ -773,7 +773,7 @@ If nothing new has been added, return nil."
 	 (buffer (find-file-noselect file)))
     (when buffer
       (with-current-buffer buffer
-	(when (re-search-forward (concat "\\([0-9a-fA-F]\\{30,\\}\\).*?"
+	(when (re-search-forward (concat "\\([[:xdigit:]]\\{30,\\}\\).*?"
 					 (regexp-quote org-mobile-capture-file)
 					 "[ \t]*$") nil t)
 	  (goto-char (match-beginning 1))
diff --git a/lisp/org-table.el b/lisp/org-table.el
index 51ac0b82a..e37a1a6c0 100644
--- a/lisp/org-table.el
+++ b/lisp/org-table.el
@@ -170,7 +170,7 @@ table, obtained by prompting the user."
   :type 'string)
 
 (defcustom org-table-number-regexp
-  "^\\([<>]?[-+^.0-9]*[0-9][-+^.0-9eEdDx()%:]*\\|[<>]?[-+]?0[xX][0-9a-fA-F.]+\\|[<>]?[-+]?[0-9]+#[0-9a-zA-Z.]+\\|nan\\|[-+u]?inf\\)$"
+  "^\\([<>]?[-+^.0-9]*[0-9][-+^.0-9eEdDx()%:]*\\|[<>]?[-+]?0[xX][[:xdigit:].]+\\|[<>]?[-+]?[0-9]+#[0-9a-zA-Z.]+\\|nan\\|[-+u]?inf\\)$"
   "Regular expression for recognizing numbers in table columns.
 If a table column contains mostly numbers, it will be aligned to the
 right.  If not, it will be aligned to the left.
@@ -195,9 +195,9 @@ Other options offered by the customize interface are more restrictive."
 	  (const :tag "Exponential, Floating point, Integer"
 		 "^[-+]?[0-9.]+\\([eEdD][-+0-9]+\\)?$")
 	  (const :tag "Very General Number-Like, including hex and Calc radix"
-		 "^\\([<>]?[-+^.0-9]*[0-9][-+^.0-9eEdDx()%]*\\|[<>]?[-+]?0[xX][0-9a-fA-F.]+\\|[<>]?[-+]?[0-9]+#[0-9a-zA-Z.]+\\|nan\\|[-+u]?inf\\)$")
+		 "^\\([<>]?[-+^.0-9]*[0-9][-+^.0-9eEdDx()%]*\\|[<>]?[-+]?0[xX][[:xdigit:].]+\\|[<>]?[-+]?[0-9]+#[0-9a-zA-Z.]+\\|nan\\|[-+u]?inf\\)$")
 	  (const :tag "Very General Number-Like, including hex and Calc radix, allows comma as decimal mark"
-		 "^\\([<>]?[-+^.,0-9]*[0-9][-+^.0-9eEdDx()%]*\\|[<>]?[-+]?0[xX][0-9a-fA-F.]+\\|[<>]?[-+]?[0-9]+#[0-9a-zA-Z.]+\\|nan\\|[-+u]?inf\\)$")
+		 "^\\([<>]?[-+^.,0-9]*[0-9][-+^.0-9eEdDx()%]*\\|[<>]?[-+]?0[xX][[:xdigit:].]+\\|[<>]?[-+]?[0-9]+#[0-9a-zA-Z.]+\\|nan\\|[-+u]?inf\\)$")
 	  (string :tag "Regexp:")))
 
 (defcustom org-table-number-fraction 0.5