It was reported in the Jakarta Post today that workers in 13 airports in Indonesia, including Bali's airport, are likely to strike on the 21st January. Air traffic controllers will inform all aircraft that they cannot land.
the full article is here:
http://www.thejakartapost.com/detailheadlines.asp?fileid=20050114.B04&irec=8
The strike will not go ahead if the Government agrees not to take over the managing of workers' pension funds.
If you're planning to arrive on this day, you should probably contact your travel agent ASAP to change the date before everybody finds out about it.