Since I updated Plasma to version 5.10, the following error has popped up every time I log in:

Executable: kactivitymanagerd PID: 2147 Signal: Segmentation fault (11) Time: 03/06/2017 16:34:17

Application: kactivitymanagerd (kactivitymanagerd), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2bc9412180 (LWP 2147))]

Thread 2 (Thread 0x7f2bbc785700 (LWP 2150)):
#0  0x00007f2bc6cf12bd in poll () from /usr/lib/libc.so.6
#1  0x00007f2bc64ae8e0 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f2bc64b0679 in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007f2bbf31c1d9 in ?? () from /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f2bc73e8e9c in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f2bc5929297 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f2bc6cfb25f in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f2bc9412180 (LWP 2147)):
[KCrash Handler]
#6  0x00007f2bc73e0d47 in QMutex::lock() () from /usr/lib/libQt5Core.so.5
#7  0x00007f2bc7f3deb7 in ?? () from /usr/lib/libQt5DBus.so.5
#8  0x00007f2bc7f3ef1c in QDBusConnection::sessionBus() () from /usr/lib/libQt5DBus.so.5
#9  0x00007f2baf61b0c8 in ?? () from /usr/lib/qt/plugins/styles/qtcurve.so
#10 0x00007f2baf620210 in ?? () from /usr/lib/qt/plugins/styles/qtcurve.so
#11 0x00007f2baf6202a9 in ?? () from /usr/lib/qt/plugins/styles/qtcurve.so
#12 0x00007f2baf653558 in ?? () from /usr/lib/qt/plugins/styles/qtcurve.so
#13 0x00007f2baf653619 in ?? () from /usr/lib/qt/plugins/styles/qtcurve.so
#14 0x00007f2bc75c2e07 in ?? () from /usr/lib/libQt5Core.so.5
#15 0x00007f2bc75b3a62 in ?? () from /usr/lib/libQt5Core.so.5
#16 0x00007f2bc75b3ba9 in ?? () from /usr/lib/libQt5Core.so.5
#17 0x00007f2bc7602a83 in QObject::~QObject() () from /usr/lib/libQt5Core.so.5
#18 0x00007f2bc83768b9 in ?? () from /usr/lib/libQt5Widgets.so.5
#19 0x00007f2bc6c44298 in __run_exit_handlers () from /usr/lib/libc.so.6
#20 0x00007f2bc6c442ea in exit () from /usr/lib/libc.so.6
#21 0x00007f2bc90b685f in KDBusService::KDBusService(QFlags<KDBusService::StartupOption>, QObject*) () from /usr/lib/libKF5DBusAddons.so.5
#22 0x0000000000408e7d in ?? ()
#23 0x00007f2bc6c2e43a in __libc_start_main () from /usr/lib/libc.so.6
#24 0x00000000004090da in _start ()

Although that error appears, Plasma seems to work well.
Switching to a non-QtCurve widget style (such as Fusion or default Breeze) solves the issue.

Is anyone facing the same situation?

Cheers,
Chris