Expander: BAlerts weird layout

[humdinger]

This is hrev56578+59, 64bit.

• Open an archive in Expander.
• Put some non-existing location in the Destination text box (like adding a "/newfolder" to the default location there).
• Press "TAB" and this BAlert appears:

Why does it look funny? The code appears like any other BAlert:

BAlert* alert = new BAlert("destAlert",
	B_TRANSLATE("Destination folder doesn't exist. "
		"Would you like to create it?"),
	B_TRANSLATE("Cancel"), B_TRANSLATE("Create"), NULL,
	B_WIDTH_AS_USUAL, B_INFO_ALERT);