The "Other:" information in the card preview pane doesn't break lines (enter). It just alligned in one single line that breaks only when reaching the end of the row, disregarding whether there's a <br> in the text or not. In addition, the captions (Display name:, Home:, Fax:) should differ somewhat from the data, maybe by having a slightly lighter colour.
The first item is logged in bug# 115908. The second item is interesting so I'm going to change the Summary of this bug from ""Other:" info in card preview doesn't honour <br>/enter" to "[RFE]Captions (Display name:, Home:, Fax:)in card pane should look different" Adding jglick to consider this idea. I think it would make reading the card pane easier, especially when there are many entries.
[RFE] is deprecated in favor of severity: enhancement. They have the same meaning.