Nepomuk errors KDE 4.11

[Mark Fraser]

Recently upgraded Kubuntu 13.04 to KDE 4.11 and I've started getting errors 
from Nepomuk in the sys logs.

kernel: [ 9708.593041] nepomukindexer[29704]: segfault at 570 ip 
00007fe34b77816e sp 00007fff11afe400 error 4 in 
libQtGui.so.4.8.4[7fe34b370000+a60000]

Which is repeated every 3-4 seconds. Tried doing an Internet search, but 
nothing is coming up.

Any ideas?