Thunderbird line spacing

I just updated to the latest version 31.3.0 and the line spacing for 
messages in a folder and also the folder tree has changed to 
disturbingly large. How can I get back the old tight line spacing?

Thank you,

Mauno
1
Mauno
12/30/2014 11:46:45 AM
📁 mozilla.support.thunderbird
📃 22506 articles.
⭐ 5 followers.

💬 0 Replies
👁️‍🗨️ 2543 Views