Can Barely See Logic Brick Connectors

As the title says, I can barely see the lines that connect logic bricks in the logic brick editor. They are ridiculously skinny; I have to put my face right up next to the screen to see them. I tried changing the background color in user preferences, but this didn’t help much. This is definitely a computer-specific problem; I can see them fine at a computer at my school, but I can’t see them at my laptop. I have a Toshiba Satellite L305, with a Mobile Intel 4 Series Chipset for a Graphics card, and a dual core Pentium. I’m also using Windows Vista. I believe I tried re-installing Blender once (not recently), but I have this problem on both 2.56 & 2.57.
Thanks for any help!