Jan 15, 2015, 6:29 AM
I tried with the same browser to change the emulation which is 7 by default.
Generally speaking, those emulation/compatibility modes mostly work well, but they are not officially supported either by us or Sencha. The reason is the fact that, for example, the original IE8 and the IE8 emulation mode in IE10 are not the same. Some page might work well in the original IE8, but it doesn't work in the emulation mode. So, the recommendation is to avoid using the emulation modes.
If the problem is reproducible in any original (not an emulation) version of IE, please let us know. We could try to investigate.