User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.3a2pre) Gecko/20100216 Minefield/3.7a2pre (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.3a2pre) Gecko/20100216 Minefield/3.7a2pre (.NET CLR 3.5.30729) Updated to the latest nightly of Minefield. The new default buttons seemed oddly shaped (expected the back button to be round and the home and reload buttons to be square). I therefore reset the toolbar to the default set. The buttons were looking as expected. Then I readded the Adblock Plus and SmileyXtra icons to the toolbar and the default icons were once again vertically compressed. Reproducible: Always Steps to Reproduce: 1. Right click Toolbar -> Customize -> Reset Default Set 2. Right click Toolbar -> Customize -> Pick non default icon 3. Move icon anywhere onto the Toolbar Actual Results: Resetting the Toolbar fixed the compression but adding the non default icons brought it back again. Expected Results: The default icons should have remained unchanged and the location and/or search bar should have been shrunk instead

This might get fixed with bug 545842.