I no longer see the “See Also” field, near the the upper right corner. “See Also” was quite useful to add bugs because it automatically updated the referenced bugs as well. “See Also” is still mentioned in the release notes, so maybe this is just a simple configuration issue?
+1, please restore the "See Also" field. I've been a heavy user of the field, for the exact reason that Florian states. "See Also" is a weak bi-directional link within the RH Bugzilla instance (unlike Depends and Blocks, which are strong and uni-directional links). "See Also" is also not replaced by "External Bug Tracker" references, since those are not bi-directional. I've noticed RH BZ#1400445. Was "See Also" removed due to that report? In my opinion, that was a wrong move. For an example of "See Also" use, please refer to bug 1654388. The comment list displays updates to the "See Also" field, but the current value is not shown near the top, and it also can't be updated.
We chose to consolidate to using external trackers, since poeple wanted see also to act like external ttrackers do and we don't have the capacity for supporting both. An RFE for changes to how it works for internal links would be welcome.