This morning we noticed in our Litmus previews and live tests that our <br> tags started adding, what appears to be, extra line-height/line spacing. I changed one line to use a <span style="display: block;"> instead of a <br> and it rendered as expected. Has anyone else noticed this bug recently?
Here is the my biuilder preview: https://litmus.com/builder/documents/2763736
Scroll down to line 298 and look for "Save on games and puzzles".

Update: Well, it seems that the <br> tag still works but adds the extra spacing when the following pattern is employed:

<a alias="" href="" style="text-decoration:none; display:block;">
<span style="font-family:Arial, Helvetica, sans-serif; font-size:14px; font-weight:normal; color:#333333; mso-line-height-rule:exactly; line-height:100%;"><span style="color: #cc0000;">Deals</span> on <br />Melissa & Doug toys* <span style="font-size:18px;">&#8250;</span></span>
</a>

It seems that nesting a <span> (with all of your copy styles?) inside an <a> tag adds the extra space to the <br> within.
Because this pattern has no issues with the <br> tag:

<a alias="" href="" style="text-decoration:none; display:block; font-family:Arial, Helvetica, sans-serif; font-size:14px; font-weight:normal; color:#333333; mso-line-height-rule:exactly; line-height:100%;"><span style="color: #cc0000;">Save</span> on <br>games & puzzles* <span style="font-size:18px;">&#8250;</span></a>

So weird. It has never been a problem until this morning. Time to update the templates.