Apple Event: May 7th at 7 am PT
2.4 MBP, Mac OS X (10.6.7), 1983 biodiesel Vanagon
Yes, I like your cursor better, except it is only 16x16 pixels while mine is twice the size. I had to expand yours to 32x32 and it is working well. I also notice that in Preferences there is a Cursor color option, however that only affects the Insertion Point flashing bar, not the cursor. Apple really does some dumb stuff sometimes.
I checked out the Dusk theme which has a dark background, but I use Midnight which is totally black. I also have the Thunderbolt display at size 2048x1152, possibly Xcode knows it and that is why my cursor is twice the size of yours. Unless the Midnight theme selects large fonts and cursor, don't know. I am using Xcode 4.4 in OSX 10.8.
I created a public repo with succinct instructions, and a replacement TIFF image to use as a cursor here: https://github.com/egold/better-xcode-ibeam-cursor
Hopefully it is helpful to people!
XCode 4: Editor's pointer I-beam is invisible
