T610 - 10 digit limit when entering a number

There appears to be times when the T610 will come up with a screen which
only allows number entry. Each screen has a different icon:

1. Edit phone number in phonebook. Icon = home, work etc
2. Dial a number. Icon = handset
3. WAP page number field. Icon = Sheet of paper and a small box next to it
saying "123"
4. Java app. Sheet of paper which says "123" (in red) ON IT.

My problem is with the last one - it only seems to allow me to enter 10
digits. Any ideas?

TIA
Sohail