<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by auh2o:
Wow. I learn something every day. I almost always ask for aisles across from each other and have never been denied.</font>
Hmmm perhaps that is permitted - technically they are adjacent

I think what Wannabe 1P was referring to was trying to book a window and aisle whilst leaving the middle seat empty - which is not permitted.