The PreferredWidth property has a strange behavior when set to all columns of a table and one of the rows is with ColumnSpan greater than 1. The width is properly set, but seems to be not respected while measuring the table and its children.


Second Scenario using RichTextBox UI: Create a document containing a table with horizontally merged cells and custom set columns` width and export it to HTML. When importing this HTML document back to the RichTextBox the column width value was not preserved.