Google Wave in Firefox on the Windows platform have problems with the ususal Alt Gr + 2 key combination for typing the at symbol @. Almost every solution I've seen to the problem have been of the type copy and paste the at symbol. Thats not effective enough for me when I have to use a Windows computer.

InitialBLIP solution:

Alt + 64

Hold down your Alt key and type 64 on the numerical keyboard and then release the Alt key.

Now you have an easier method of writing the missing @ in Wave on Windows.

Update 2009.10.13 If you have a netbook type of computer without a numerical keyboard, locate your numlock key/key combo.

Update 2009.10.19 This bug has now been fixed