I try to just display some text, like this:
setTextString(MainText, "abcdefghijklmnopqrstuvxyz ABCDEFGHIJKLMNOPQRSTUVXYZ ")
ClearScreen()
SetTextVisible( mainText, TRUE)
SetSpriteVisible (renderSpr, TRUE) // Make the sprite visible
DrawSprite( renderSpr ) // Draw the sprite
DrawText( mainText )
Swap() // displays the buffer to the screen
SetSpriteVisible (renderSpr, FALSE) // Make sprite invisible
SetTextVisible( mainText, FALSE)
And it ends up like this:
Quote: "a defg i l n t z ABCDE GHI L NOP RSTUV Y"
I tried it with various fonts, including the default one. Even for an error, isn't it pretty strange?