Using a freshly installed PR 1.3 (i.e., with a stock 2.6.28-omap1 kernel), the module linked in the first post, i.e., AndrewX192's version, results in a reboot loop. Replacing it with stlpaul's version allows the system to boot and writing to the card does not result in any errors. MD5 hashs of the various modules: Original (/lib/modules/2.6.28-omap1/omap_hsmmc.ko): 1c6e453684ea56cbb04dd0b2506d6cd6 Broken (AndrewX192's version):6bd52c239ea51cbeb34b6ead0c02e325 Working (stlpaul's version): d4468028f54732292bbe08ae4d5d73d4