I received feedback, that the decimal part of TrickyTripper's number input is not possible on few telephones. I investigated the problem. The issue is due to inferior softkeyboard implementations on various models. I will provide a bugfix with a workaround probably during this week. Phones affected I know about are:
HTC Desire Bravo
Samsung Galaxy S3
Samsung Galaxy 9000
Sorry, I was lacking the hardware. I only own a HTC Desire.