The attached patch (extracted from XFree86 CVS) fixes an important bug in libXrender where Xrender could generate invalid protocol streams when rendering long text strings. The patch also includes a fix for a crash you'd get when using our XFree86-libs with a server with a newer version of XRender. It isn't important now, but will be more important when we eventually ship XFree86-4.3.
Created attachment 74426 [details] Patch to xc/lib/Xrender/Glyph.c
Patch applied to 4.2.0-70 in rawhide.
Packages test out test fix the test case I have and to work well otherwise, thanks