I was recently looking for ways to disable anti-aliasing in kdevelop's editor, without disabling it entirely in KDE. Kdevelop does not provide such an option, you can only change the font used in the editor. Here's what I did: 

1) My monospace font of choice is Andale Mono (thanks MS!). I copied it to a new file, and used fontforge to change it's name to "Andale Mono NoAA". Pick this font up from here. 

2) Place it in your ~/.fonts dir. KDE or Gnome should pick it up right away. 

3) Add the following to ~/.fonts.conf

<match target="font">

<test qual="any" name="family" compare="eq">

<string>Andale Mono NoAA</string>

</test>

<edit name="antialias" mode="assign">

<bool>false</bool>

</edit>

</match>

4) Select "Andale Mono NoAA" in kdevelop (or in any editor for that matter), and voila! Antialiased text in the interface, no A/A in the editor! Your coding productivity should triple! :-)

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