After Sharepoint 365 update (end 09.11.2012) resources string in list definition start display as:
$Resources:_FeatureId{AC83475A-588E-4876-BB71-24524023F731},FieldSortOrderDisplayName;
Field definition:
<Field Name="SortOrder"
ID="{612ffa3a-3842-404d-a88a-f17fad13a874}"
DisplayName="$Resources:FieldSortOrderDisplayName;"
Type="Number" Decimals="0" Required="TRUE">
or
<Field Name="SortOrder"
ID="{612ffa3a-3842-404d-a88a-f17fad13a874}"
DisplayName="$Resources:_Res,FieldSortOrderDisplayName;"
Type="Number" Decimals="0" Required="TRUE">
The same result. How to resolve?