I know tab sizes are a source of frustration for many people, and there's been a design change which some don't like.
But regardless of the design change, it's surely a bug that tabs stop using the condensed font when more tabs are added. Here's a screenshot:
I produced this by drag a tab from another smaller panel that required no shortening of any kind into this congested panel that already had the "arrow" present. That seems to reproduce the bug fairly consistently. It should look like this, of course:
