If tab position is left or right their labels have text oriented vertically. When you rename some note, the text in it's tab label becomes oriented horizontally. In other tab labels text remains oriented vertically. Steps to reproduce: 1. Set tab position to left or right 2. Rename some note xfce4-notes-plugin 1.7.2
Now that's funny, I fixed this bug in the 1.6.x version (maybe prior), but since I rewrote the plugin with Vala I obviously forget some small fixes. Thanks for notifing, I'll fix it!
Fixed in git 10ddaaa..5f99d4a.