Upon registering QSocketNotifier in BB10, a spurious warning is logged:
"io_notifier_remove_fd fd 17 not found"

It seems to be related to the call order in QEventDispatcherBlackberry:
—
// Call the base Unix implementation. Needed to allow select() to be called correctly
QEventDispatcherUNIX::registerSocketNotifier(notifier);

// Register the fd with bps
BpsChannelScopeSwitcher channelSwitcher(d->bps_channel);
int io_events = ioEvents(sockfd);
if (io_events)
bps_remove_fd(sockfd);
—
The call to super::registerSocketNotifier causes an entry in enabled_fds
for given type, thus the ioEvents() returns nonzero and the code tries
to clean up underlying bps first, which complains...