The widget icontask doesn't pin all libreoffice applications. It Pins only one. When Libreoffice calc, writer, impress is open, only one is pin when the other are closed Watch printscreen Reproducible: Always
Created attachment 73816 [details] libreoffice-tasklist
Created attachment 73822 [details] libreoffice-tasklist2
You might need to add some "launcher matching rules" per libreoffice application. There should be some existnig ones, but it could be that these are out of date. I've just chcked with KDE 4.9 on Kubuntu 12.04, with LibreOffice 3.5.4.2 - and I can pin write and calc separately.
I have LibreOffice 3.6. This is perhaps the problem ?
Could be. But, as I said, you need to create new "launcher matching rules". In the icon-tasks config dialog, go to the "launcher matching rules" page. Select "Add", then "Detect window properties". Move the + cursor onto the libre office window, and click. Then press the 'folder' button to select the relevant launcher (this brings up the app selector, use this to find writer, etc)
I resolved the problem the shortcut in the start was libreoffice --writer %u libreoffice --calc %u libreoffice --base %u libreoffice --impress %u I made a symbolic link from ln -s /usr/lib/program/swriter /usr/bin ln -s /usr/lib/program/scalc /usr/bin ln -s /usr/lib/program/sbase /usr/bin ln -s /usr/lib/program/simpress /usr/bin I change it to swriter %u scalc %u sbase %u simpress %u And it's working. Resolved