Sometimes can't add new block content.

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I played around with few free themes and sometimes I can't add new block content - for example on Grain themes head area. I think it may be something css related, but not sure and haven't figured it out yet.

 
Grandovskis replied on at Permalink Reply
Ok, got it. Problem is Z-index in css. concrete gives z-index of 5. I think it should be a lot more than this! :) Meanwhile solution is to use z-index in templates below 4.