@Sebastian: Sorry about helping somewhat to derail this thread.
I only wanted to report that, in my system, the Nepomuk E-Mail feeder can trigger the same behavior (a hanging query). Alvaro reports that the Nepomuk Contacts feeder can also trigger the same behavior.
There's a pattern here: just like KRunner plugins, those feeders exercise the same parts of NEPOMUK and can produce the same bugs. So, if KRunner plugins are fixed, those runners must be fixed too as part of this bug.
@Sebastian: Sorry about helping somewhat to derail this thread.
I only wanted to report that, in my system, the Nepomuk E-Mail feeder can trigger the same behavior (a hanging query). Alvaro reports that the Nepomuk Contacts feeder can also trigger the same behavior.
There's a pattern here: just like KRunner plugins, those feeders exercise the same parts of NEPOMUK and can produce the same bugs. So, if KRunner plugins are fixed, those runners must be fixed too as part of this bug.