Vertical space in a table cell gives latex errors

[Helge Hafting]

I have a table with a tall row, because one cell is fixed-width with 
multiple lines.
In another cell I wanted to place a single symbol, preferably centered
vertically.
I tried changing the column's vertical adjustment, but this had
no effect whatsoever.

So I tried forcing my way with insert->vertical space before
and after the symbol. Latex puked on this.

Perhaps \vfill in a cell isn't supported by latex - then LyX
ought to disable the insertion as well.

Helge Hafting