Это не ошибка (http://www.slounik.org/search?dict=nn%7Csbm%7Cnazounik%7Cdzsl%7Cprym%7Cparonimy%7Cepitety%7Ctrasianka%7Ctlum%7Cprynaz%7Cfraza%7Cstarbiel%7Ccalaviek%7Czyvioly%7Crasliny%7Cdyjalekt%7Ckrajovy%7Clahojsk%7Cparaunanni%7Croznajes%7Cnb%7Cbulykarb%7Ckrapivarb%7Cvlastrb%7Csanko%7Cbnt01%7Cbnt02%7Cbnt03%7Cbnt04%7Cbnt05%7Cbnt15%7Cbnt17%7Clingrb%7Cmiedrb%7Cfizyjarb%7Cfarmarb%7Cbijarb%7Clashasrb%7Cekanamrb%7Cekanam2rb%7Cfizmat%7Cmatrb%7Cvajskovy%7Cbn%7Cbulykabr%7Cstanbr%7Cbiez%7Cmiedbr%7Cpolisemija%7Cpalihrafab%7Cpalihrafba%7Cmatba%7Cpaskievicab%7Cmalyab%7Cpbs%7Cprykazkilb%7Cprykazkiib%7Cubs%7Cvuhb%7Cpismienniki%7Creldz%7Cruchi%7Cdemap%7Cnac%7Casvietniki%7Ckulturalogia%7Cmify%7Carchitekt%7Ccerkvy%7Cmatematyka%7Chramadstva%7Csac%7Cczyrvon%7Camfibii%7Ceka%7Cmikrabija%7Cvirus%7Cgieagraf%7Cgieabiel%7Cist%7Ckto%7Cfilmyr%7Chistorical%7Cstatehood%7Cschrift%7Croznaje&search=%D0%B4%D1%80%D1%83%D0%B6%D0%BD%D1%8B&x=46&y=2). Да и на всех табличках именно так и написано.