Rated 4 out of 5 stars

Από τον/την Mira.S στις Νοέμ. 21, 2012 · μόνιμος σύνδεσμος

Thanks to Oosterhagen and his review on Classic TB2, same problem same solving.
In TB17 setting "mail.tabs.drawInTitlebar" to "false" works also in Classic Reloaded 1.5.2 though now there's an extra grey line under the systembar.