Number of lines on the screen

[Jan and Bertil Smark Nilsson <jbsn@tpg.com.au>]

Greetings,

I used to have 25 lines on my screen, then I had thirty and now I 
have 37. I've a 2.6.31 kernel and I'm running Grub 0.97-59 with 
Grub-pc 1.98~experimental.2. How do I change it back to a 25-line 
screen? I've been looking everywhere for a solution. I'm aware 
that it's not an access problem, but I'm trying the easy option 
first, since I'm not a subscriber to any general Debian list.

Bertil