Seems that 'http://dl.dropbox.com/...' is down atm and - as our resources are hosted there - we are affected by this. Mirrors, e.g. 'dl4', 'dl5' instead of 'dl', seem to work.

While testing the makefile for the new 1.5.3 version we errouneously replaced the shlib for 1.5.2 and when downloading the shlib from the xlsReadWrite CRAN version an error with 'Incorrect number of arguments'  has been displayed. Correct shlib restored again. Thanks to Suray Menon for notifying us.