I've been a user of Kubuntu for 2 years now and I've upgraded the system when a new version came out. So far I was fine, but now with the Kubuntu 14.04 LTS upgrade and the KDE 4.13 also updated I found a very annoying problem:
The file manager Dolphin takes an eternity to be functional. When you open it, it comes out quickly but then it doesn't respond for as long as a minute. When finally works it's all fine, but if I close it and reopen it, it happens again.
I tried launching Dolphin from the terminal, and this is what it came out.

santiago@santiago-PC:~$ dolphin

Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)

Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)

Bus::open: Can not get ibus-daemon's address. 

IBusInputContext::createInputContext: no connection to ibus-daemon 

QPixmap::scaled: Pixmap is a null pixmap

dolphin(2841)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed:  "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." 

I never had problems with the startup speed in my previous upgrades, but since 14.04 it's really slow. I also noticed that it's only Dolphin, since Gwenview and other KDE-related programs run just fine.
I hope I made myself clear (sorry for the language, I'm from Argentina), and really hope anybody can help me. If you might need any other information please tell me and I'll provide it as quick as I can.
Thanks in advance, have a nice day.