Q: My keyboard is acting up; typing strange characters, why is that?

Time to try a different keyboard, then. Also, try the problematic keyboard with a different computer and see if the problem follows the keyboard.

Yup, if there are fresh batteries in that keyboard, that definitely sounds like a problem with the keyboard.

Thomas is probably right that the keyboard itself has a problem, but one more thing to try, in addition to another set of new batteries since a couple users have found "new" batteries are not always what they are supposed to be...turn the keyboard off, remove the batteries, then start typing and pressing keys...place your hand flat on the keys and just randomly press all over the keyboard.  After doing this for 5-10 minutes, reinstall fresh batteries and try the keyboard with the computer.  Sometimes this procedure will discharge the capacitance switches used for the keys and they will start working correctly again.

In that case, it would be good to take the keyboard to an Apple store genius bar and have the techs test it, or they may just say it needs to be replaced.  If it is under warranty they should handle it on the spot for you.

my phone is doing the same thing @Carm. what was your solution. Please be kind to guide me through by replying to my email since i am not always online. my email is kapi.gantsu@gmail.com

not sure if you have resolved the problem, it took me quite a while, but I think I found the culprit and was able to get rid of this hassle. go to "system preferences", then "keyboard", click "text", delete everything there are there, close it, problem solved! hope this helps!

My option key didn't look stuck down, but I tapped it a few times and my keyboard started typing the correct characters again! Yayyy

thank you so much