Input won't accept floats

[Francisco Jesús Martínez Serrano]

After running an external function I created, which starts a libglade
(gtk) application in a separate thread, the following happens to my
input:

octave:1> irhys_stub;irhys_start
OpenGL extension version - 1.3
[...application messages...]
octave:2> 3.5
ans = 3
octave:3> 35/10
ans = 3.5000
octave:4> 1.5
ans = 1
octave:5> 1.99
ans = 1

So I have to input fractions instead of decimal point numbers. Not a
huge hassle but still annoying.

Does anybody know why is it happening? In which way can an external C
function interfere with octave that provokes that?

My octave version is 1:2.1.72-8 on Debian.

Thanks!