Thanks for your attention on my problem. Yes I saw the iThemes Security option with file locking but disabling it didn’t shout any progress with me. I asked iThemes Security developer for further steps to make. I will report here when (if) “bug” will be fixed I hope that this will happened soon.
> The reason also could be conflict with some other plugin.
Got it! iThemes Security plugin was the problem. When plugin disabled I can delete Gmedia items immediately. Site security is great impotrance for me so would this conflict be revised in upcoming upgrade?
Got it worked with [raw] shortcode.
Still can’t delete one of the exsisting non used gallery with Manage Galleries. Can’t delete Tags with Albums, Tags… either?
p.s. And I can’t delete images from Gmedia Library too…. obviously serious read/write plugin problem!!!
Rattus thanks for fast reply
Wrapping gmedia shortcode with [raw] shortcode seems as working but destroyed my page layout. No luck with [noformat] shortcode with my theme. :-(