Is there anything temporary to do for a leaky pad? The key that my middle finger on my left hand does not close properly. I seem to get leaky pads a lot. What are Straubinger pads like?

IMHO, Straubinger pads are a marketing hype. I had them on a Powell flute once and hated them! They seem to trap moisture in for long periods of time. Another problem with them is that you can`t have them installed just by any tech.
It sounds like you just your adjustment screw came loose. I am afraid to tell you how to fix it without seeing the flute first and knowing for sure. If you keep on getting leaks, it is most likely your adjustment screws keep on making there way out. A good quick and easy solution to stop that from happening is to put a TINY drop of clear nail polish on the head of the screw to keep in place. Try just putting the nail polish on a toothpick and putting it on that way.
Your best bet is to take it into a quantified repair tech first.

Thanks so much! I took my flute in today to the technician and it was a lose screw. I will have to get my flute teacher to show me how to fix those by myself! -- Candice

Your welcome!

Loose screws are easy to fix...all you need is an eye glass screw driver.

Which screws? There is probably NO procedure to do with adjusting a flute that is always easy. There are pitfalls for the ignorant - using the word in the nicest way possible - at every corner. A complete and reliable flute adjustment can be as complex as many surgical procedures. Would you do your own dental work, or your own hip replacement? Your own car gear box overhaul?

A problem on a flute is very, very rarely JUST a lose screw.

First, no screw should just work loose.

Second, a loose screw CAUSES other pad leakage problems that are not necessarily corrected when the screw is tightened. Many screws cAn cause severe damage if they are over-tightened, because they have an adjustment function.

Third, turning screws is a very small part of adjusting a flute, and almost every adjustment is related to several others, which are in turn related to others, and cannot be made in isolation. Etc, etc, etc....

For flute work you need an experienced, thorough technician with an excellent reputation.

Lucky for her, it was just a loose screw as I suspected from what she was telling me. I have seen this in many cases where one screw just makes it`s way out and all that is needed is for it to be re screwed back in. I am not saying this is the case all the time, but sometimes.
I happy to hear that I was able to help.

I agree about the Straubinger pads.
I come across them on several instruments, without being much impressed.