Current (on Nov. 15th, 2014) LPC1114 Ticker function has a trouble after one hour and 11 minutes after due to 32bit timer overflow. I hope this will be fine by mbed support team.

Dependencies:   mbed

Please refer following Note.
http://developer.mbed.org/users/kenjiArai/notebook/lpc1114fn28---suggestion-for-improvement/#

Revision:
0:d54a5362ac2a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Nov 15 08:00:10 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/031413cf7a89
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