CREATE TABLE table_26707 ("Major version" TEXT, "Minor version" TEXT, "WebKit version" TEXT, "Operating System" TEXT, "Release date" TEXT, "Features" TEXT)

List all OS's with a webkit version of 525.29.1.
SELECT "Operating System" FROM table_26707 WHERE "WebKit version" = '525.29.1'
SELECT "Operating System" FROM "table_26707" WHERE "WebKit version" = '525.29.1'