It's possible to make a local time signature change in standard notation and not in a linked tabulature.

If we have two connected staffs: a standard notation and a tabulature, then the feature of locally changing time signature by holding a CTRL key should apply to both of them. The reason is that they refer to the same piece of music - they are just different notations.
Repro:
1. Create a guitar part with linked standard notation and tabulature staffs.
2. Add a local time signature to one of them (by holding Ctrl key)
expected: time signature applied to both linked staffs. While dragging it from a palette, bars on both staffs should be highlighted.
actual: time signature applied to one of them.

Moreover, it's not visible if applied to tabulature. (by design)

Win7, abbf2c8