Opening some workbooks takes a long time

[jazzthief81]

A very limited number of workbooks take a long time to open.

Examples:
KansaiOpen2013-forWCA.xlsx 110,5
SNESOPEN-forWCA.xlsx 49,17
Cubao Open 2013 Results.xlsx 40,297
Results of Beijing Summer Open 2012.xlsx 37,309
CubaoOpen2013.xlsx 37,168
Colombia Metodo Genius 2011 Results.xlsx 32,197
Cherry Blossom Viewing Open 2013-forWCA.xlsx 31,863
Perry Open 2013 Results.xlsx 28,794
Results of Guangzhou HEMC.xlsx 27,08
amstelveenopen2012.xlsx 24,339
Orizaba Cube Fest 2012.xlsx 24,123
Reto Chignahuapan 2011Results.xlsx 8,963
Guadalajara Open 2011.xlsx 7,541