On 14 Jun 2014, at 13:19, Allan Odgaard wrote:
[…] If Apple doesn’t address it, we could probably delay setting the window size, but I’m not on 10.10 myself, so can’t test ATM.
Turns out that this is triggered by having a 1px high tab bar view (kudos to Jacob Bandes-Storch for tracking this down).
For now a workaround is to enable “show for single document” in Preferences → Projects → Document tabs. This is the default setting, so only applies to people who have changed it.