Problem in last few betas (including 6.80b6)

[farmwald]

In the dock under the subjects: (contains "Search", "Groups List", "Image Database", <group lists>..., I can only get a single entry to display in <group lists>.
E.g., the first group or group-list I click on works fine, the second one replaces the first, whereas it should be added to the end (right) of the list.
I can't find any switches that could change this and I can't see why one would ever want this behaviour.
I'd rather not reinstall, as it takes forever to re-download headers.

[Quade]

options/switches/multi-tab mode. From the options menu settings window.