This may not be an IDEA issue. Occassionally, when an app updates itself under Mountain Lion, the dock icon gets "fuzzy". One way to "fix" this is to logoff and then, log back onto your Mac.
I noticed that too. But it does not appear fuzzy. When the fuzzy dock icon issue occurs, the dock icon appears pixelated / distorted. Based on searches I did, this is caused by an icon cache that does not refresh properly. Logoff / logon fixes this. The link below points at a thread on the Apple Support Communities site that discusses this.
It's not fuzzy for me, what I meant by 'muddy' is that it looks a dirty off-blue colour and not clean and bright as previous icon.
I am aware that there is a current trend away from gloss and textures towards a more flat design but within current Mac OS X this doesn't really fit in, epecially in the dock where the tone of the icon blends in with the background rather than standing out; maybe on other platforms it works better.
Not that it matters for the application functionality, just my tuppence worth...
This may not be an IDEA issue. Occassionally, when an app updates itself under Mountain Lion, the dock icon gets "fuzzy". One way to "fix" this is to logoff and then, log back onto your Mac.
The icon has definitely changed (for the worse IMHO) with a more muted colour and a flat look.

I noticed that too. But it does not appear fuzzy. When the fuzzy dock icon issue occurs, the dock icon appears pixelated / distorted. Based on searches I did, this is caused by an icon cache that does not refresh properly. Logoff / logon fixes this. The link below points at a thread on the Apple Support Communities site that discusses this.
https://discussions.apple.com/thread/2132399?start=300&tstart=0
It's not fuzzy for me, what I meant by 'muddy' is that it looks a dirty off-blue colour and not clean and bright as previous icon.
I am aware that there is a current trend away from gloss and textures towards a more flat design but within current Mac OS X this doesn't really fit in, epecially in the dock where the tone of the icon blends in with the background rather than standing out; maybe on other platforms it works better.
Not that it matters for the application functionality, just my tuppence worth...