"Let us know what you think of this site and what we can do to improve it."
This is very useful and helpful website and is a very good platform to employee and employer to seek for advice or looking for references. Appreciated Mr. Siew and others contributors to spend their valuable time to response our questions and to share their knowledge. Btw since this category is "Feedback" and also you have stated "Let us know what you think of this site and what we can do to improve it." so i think the Subject is no necessary. Noticed that's lot of enquiries submitted to "feedback" category.
Anyway, this is just my thought :)