The capital letter 'Q', at font size 10 is higher than all the other capitals (in addition to the tail being lower). This makes the letter stand out as larger than all the reset and is very noticeable in a all-caps word like REQUEST.
This does not seem to be a problem at other font sizes.
Can you describe how you’re using the font, because I can’t recreate this. Can you please tell us which operating system you are using, which font specifically (including format), also you might tell us the particular application, and a screenshot would definitely help. Thanks.
I am using Eclipse SDK 3.8 on Linux GTK. I've set the font as my default text font (Window > Preferences > General > Appearance > Colors and Fonts > Text Font). Eclipse is showing the font as "Source Code Pro" / Regular / 10.
(I have both the .otf and .ttf in my /usr/share/fonts/truetype folder, I'm not sure which this is).
Can you try installing only one format at a time and see if either one or the other will clear this up?
The problem is with the SourceCodePro-Regular.otf, the .ttf works well.
My take on this is that Linux type rendering is better able to handle TTF fonts than OTF fonts.