Features:
I created table.el table with Alt-x table-insert. Any text entered in
the table is invisible. The cursor moves forward but the text is not
seen. The problem occurs with or without org-mode.
This does not happen on an earlier versio of Emacs I use on another
machine, viz. Emacs 24.4.1, GTK+ version 3.14.9 of 2015-03-21

In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.14.13)
 of 2015-11-19 on pslen
Windowing system distributor `The X.Org Foundation', version 11.0.11701000
System Description: Ubuntu 15.04

Important settings:
  value of $LANG: en_IN
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: iso-latin-1-unix

Major mode: Org

Minor modes in effect:
  shell-dirtrack-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Debug (ox-odt): Searching for OpenDocument schema files...
Debug (ox-odt): Trying /usr/local/share/emacs/24.5/etc/schema/...
Debug (ox-odt): No OpenDocument schema files installed
`epa-file' already enabled
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark saved where search started
Recognizing tables...done
Mark set
C-x w is undefined [2 times]
Recognizing tables...done

Load-path shadows:
None found.

(shadow sort mail-extr emacsbug message rfc822 mml mml-sec mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
thingatpt rect tabify table org-table misearch multi-isearch org-rmail
org-mhe org-irc org-info org-gnus gnus-util org-docview doc-view
jka-compr image-mode dired org-bibtex bibtex org-bbdb org-w3m web-mode
advice help-fns cl-macs edmacro kmacro disp-table org-crypt epa-file epa
derived epg ox-odt rng-loc rng-uri rng-parse rng-match rng-dt rng-util
rng-pttrn nxml-parse nxml-ns nxml-enc xmltok nxml-util ox-beamer
ox-latex ox-icalendar ox-html ox-ascii ox-publish ox org-element
ob-python ob-asymptote ob-perl ob-matlab ob-octave ob-sh shell
ob-gnuplot ob-calc calc-store calc-trail calc-ext calc calc-loaddefs
calc-macs ob-ditaa org org-macro org-footnote org-pcomplete pcomplete
org-list org-faces org-entities noutline outline easy-mmode org-version
ob-emacs-lisp ob ob-tangle ob-ref ob-lob ob-table ob-exp org-src ob-keys
ob-comint comint ansi-color ring ob-core ob-eval org-compat org-macs
org-loaddefs format-spec find-func cal-menu easymenu calendar
cal-loaddefs cl gv cl-loaddefs cl-lib package epg-config time-date
tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
x-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list
newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer nadvice loaddefs button faces cus-face macroexp
files text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
dbusbind gfilenotify dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Memory information:
((conses 16 252129 15942)
 (symbols 48 32943 0)
 (miscs 40 1062 996)
 (strings 32 58791 7425)
 (string-bytes 1 1690448)
 (vectors 16 23082)
 (vector-slots 8 532319 10840)
 (floats 8 136 491)
 (intervals 56 1828 245)
 (buffers 960 18)
 (heap 1024 44849 2604))