Glass blocks and glass panes have no tool associated with them, so they can't be destroyed in adventure mode.
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@ForceablePlace: See http://www.minecraftwiki.net/wiki/Adventure_Mode : 12w34a Certain blocks can now be removed and placed again with correct tools
Wait, does this fix mean we'll be able to break glass in any situation in adventure mode? With more of these changes, we seriously need a mode where the player can not break the map!
I noticed glass is now breakable in adventure with your fists. Is that the fix of this (not really) issue, because if it is, it sucks since you can now break redstone/all the other stuff in adventure mode, which will break every map that uses adventure mode.
Jens Bergensten
umm this is not a bug....no blocks are breakable in Adventure mode...unless theres a bug allowing it