My karbonn a9 shows the error "the application Camera (process com.android.camera) has stopped unexpectedly. please try again." when i try to use the main camera. what should i do?

Try to clean Dalvik Cache and do a factory reset. Ususally that helps.

First, go into Settings, and choose Applications.

From the Applications menu, choose Running Services.

When shown the list of Running services, press the Menu key to show the option Show cached processes. Select Show cached processes.

Scrolling through the list of cached processes look for the Camera app and select it.

When you select the Camera process you will have the option to Stop it. Choosing Stop should successfully release the camera hardware.

After stopping the cached camera process, return to your home screen and try relaunching the camera app or whatever other app you were trying to run when you ran into the "Camera Failed" error message. It should now successfully start with access to the camera.

T-Mobile posted a solution to this problem here (I had the same problem and this resolved it): Error "The process Genius Button has stopped unexpectedly, force stop": myTouch Q by Huawei

here's the solution to your problem :D http://arimanik.blogspot.com/2011/02/sorry-application-home-screen-process.html

internet cache is full
menu>applications>manage applications>all>internet>clear cache>clear data

I also had this problem. What I did was hooked my pandigital up to my computer and put videos on there that would take up alot of room. After I unplugged it I got a message saying that my memory was low. I clicked on the message and it showed me all the default applications instead of the applications I download. I clicked on my browser and pressed force stop and clear cache and it had worked fine. If you dont feel like doing all that work I suggest you download another browser such as Opera Mini or Dolphin Browser mini.

Please check this link:

Android Fix Process com android settings stopped unexpectedly Error

Music Player

I had that same problem with mine, its just the app that does that.. do you have the picsay app on there? It actually replaces the camera and still takes the picture, but I noticed that this one never does that