roundcube 1.4.8 shrinks thunderbird text on forward or reply

[KSech]

So far I've only noticed this on emails received from Thunderbird. When we forward or reply to these emails, the original text is shrunk to a tiny font. See attachment.

I see that 1.4.9 is available - I'll gladly update if it will fix this issue, but we're not having any other issues. 

Is there another way to fix this?

[KSech]

I've toyed with this a little more.
It appears that all is well if the default font size is used in Thunderbird.
So this is probably related to how Thunderbird sets the "larger" font size.
I honestly don't know if it's a Thunderbird issue or a Roundcube issue, but I've only noticed this happening in Roundcube, not in any other client I've tested.

[alec]

I suggest creating a ticket at https://github.com/roundcube/roundcubemail/issues with attached sample message source.