Nothing wrong, and in general the freeing move e5 is good for black.
But white can usually play Ne5 and f4 instead of allowing black's e5. I often play Colle-Zuckertort (b3-Bb2), and feel I have ample support for my centre and latent attacking chances. There is also the c4 option.
Sometimes black can force white's hand by c5, a6, b5 and the threat of c4.
In general, I find these two set-ups the most annoying as a Colle player (potential opponents, please look away):
1) Black plays d5, Nf6, Bf5
2) Black plays d5, Nf6, g6, Bg7 etc
Btw, I enjoyed Kramnik's last round game in Corus, where he plays both c4 and Ne5/f4 and (finally!) attacks
http://www.chessgames.com/perl/chessgame?gid=1448603 ;
And while I'm at it, this game also inspired a Colle-Z. patzer
http://www.chessgames.com/perl/chessgame?gid=1418840
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Simple Anti-Colle (Read 9020 times)
