Our Minecraft servers are offline but we will keep this forum online for any community communication. Site permissions for posting could change at a later date but will remain online.
^1.7.2's code has been seriously re-written; meaning the creators of MCP (a modding software the creators of Optifine and GLSL shaders use) have a lot of work to do in terms of coding MCP. Be patient, they have a lot of work to do.
Quoted from the optifine page on the Minecraft Forums.Update to 1.7.2 is at 5%: Analyzing changes in 1.7.2 and waiting for MCP to fix reobfuscation.