If you remove the opkg-beta package in the näive belief this will allow the non-beta version of ir to be substituted, fix-flash-packages will now be unable to find the correct version of any* beta package (including, potentially, webif), and end up removing those beta packages without replacing them. Two of us have done this and ended up rebuilding our CFs from scratch (not including firmware update, of course). The only packages actually affected by this are ir and webif, and measures set out below can recover the situation without a complete rebuild.