I im an Arch Noob but have 5 years experience as a Kubuntu user, I have updated my system and both calibre and firefox will not run. terminal info below.

[toxicgod@toxicgod ~]$ sudo firefox
[sudo] password for toxicgod:
firefox: symbol lookup error: /usr/lib/libgtk-3.so.0: undefined symbol: g_log_structured
[toxicgod@toxicgod ~]$ calibre
Traceback (most recent call last):
File "/usr/bin/calibre", line 20, in <module>
sys.exit(calibre())
File "/usr/lib/calibre/calibre/gui_launch.py", line 60, in calibre
init_dbus()
File "/usr/lib/calibre/calibre/gui_launch.py", line 40, in init_dbus
from dbus.mainloop.glib import DBusGMainLoop, threads_init
ImportError: No module named dbus.mainloop.glib

I have just noticed cherrytree also no longer works.

[toxicgod@toxicgod ~]$ sudo cherrytree
[sudo] password for toxicgod:
Traceback (most recent call last):
File "/usr/bin/cherrytree", line 72, in <module>
f_main(args)
File "/usr/bin/cherrytree", line 49, in f_main
import main
File "/usr/share/cherrytree/modules/main.py", line 22, in <module>
import gtk, gobject
ImportError: No module named gtk

try

ldd /usr/bin/firefox

see if there is previous version before update.

update like this pacman -Syu.

try remove that packages and reinstalit.

pacman -Rnsc firefox

if any of this packages is instaled from AUR try update like this (make this last option sometimes broke more then help)

yaourt -Syu --aur

update broke something, i use arch but never have this issue with update. but as i see on arch forum its happening with installed AUR packager, after users remove them and install from offical repo that fix there issue.

I get terminal
[toxicgod@toxicgod ~]$ sudo ldd /usr/bin/firefox
[sudo] password for toxicgod:
linux-vdso.so.1 (0x00007ffe56380000)
libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f6468df9000)
libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f6468bf5000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f646886d000)
libm.so.6 => /usr/lib/libm.so.6 (0x00007f6468569000)
libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f6468352000)
libc.so.6 => /usr/lib/libc.so.6 (0x00007f6467fb4000)
/lib64/ld-linux-x86-64.so.2 (0x00007f6469016000)

Can not try the update or reinstall till i get WIFI access tmr at a friends as im using mobile net and do not have enough data for reinstall/update. But will try rest of your suggestion tmr.

that seems ok.

did you update last time from mobile internet.(maybe you run out of data and update didnt finish) i suggest first remove that packages with pacma -Rnsc firefox claibre libgtk

then pacman -Syu

libgtk package is broken he provide graphic(fonts, interface) for gui aplication so firefox is not needed for remove or calibre he yust canot get graphic library of libgtk. but i would remove them and install again beacouse they automaticly install libgtk.

so libgtk is real problem. remove reinstal update.

Really lost now said libgtk not installed uninstalled as you said and updated however the update crashed the system and now says i have no mirrorlist wont let me install or update and lost functionality of WIFI had to connect ethernet cable to get this message through and chrome browser keeps crashing/closing down.

Tried importing settings from firefox as chrome has the option however it says its succesful but does not actually do it. im now thinking complete reinstall.

managed to sort the mirror issue its trying update now. ok finished update but loads of errors.
http://pastebin.com/RYRqzyNe

ok reinstall pprograms still no work

[toxicgod@toxicgod ~]$ sudo firefox
[sudo] password for toxicgod:
/usr/lib/gio/modules/libgvfsdbus.so: file too short
Failed to load module: /usr/lib/gio/modules/libgvfsdbus.so
/usr/lib/gio/modules/libgioremote-volume-monitor.so: file too short
Failed to load module: /usr/lib/gio/modules/libgioremote-volume-monitor.so
Bus error

gonna fresh install dpownloading iso now

fresh install? good.
why in the world are you running gui apps with superuser privileges?

generally speaking, you NEVER run anything with superuser privileges, unless it is explicitely required.

Just ensuring i get copys of important stuff ive moved Local Folders, pop-mail.outlook.com, pop.googlemail.com. which i belive should back up emails (thunderbird not working now). is there anyway to retreeve firefox bookmarks and passwords so i dont loose those???

I dont usually i just used it to try see what was happening :/

i would go with fresh install beacouse something is realy broken with libgtk. you can try manualy locate all files of gtk but fresh install is better less time.

only problem on arch i have with updates is say "file exist nothing to do" i remove that files manualy and after that everything is workink.

if you have time try manuali rm -rf on this files from update and that may solve problem.(yust for diagnose). but fressh install is better.

in home dir ls -la and coppy .mozzila folder with cp -adpR