Twitter Bootstrap - Position issue with row-fluid

Answer 1

If you know the number of span for each row, you can use an expression like this:

.row-fluid [class*="span"]:nth-child(3n+1) {
   margin-left: 0;
}

for example: if you have 3 spans for each row, the above expression will removes margin from the first span of each row. And the below one removes the margin-right for the last element on each row:

.row-fluid [class*="span"]:nth-child(3n+3) {
    margin-right: 0;
}