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I have a log for you. With build 208 properties doesn't change, with 211 properties change in editor, but don't reflect into form until you change another propertie inside. And you get out of memory after a few changes...
Created attachment 1620 [details] logs of Out of memory errors
It seems that property sheet is leaking memory. Can be reproduced simply: in any form just select components repeatedly (in Component Inspector), let their properties display in the sheet. MemoryView shows about 1.5M additionally consumed with each selection change. [Build dev 212]
I have checked this and --- it is very serious. It makes the form editor unusable. Making it P1.
Fixed in trunk (PropertySheetTab 1.5).
*** Issue 12830 has been marked as a duplicate of this issue. ***
verified in [nb_dev](20011113) I don't know about any memory leeks in Property Sheets and described behaviour isn't present now.
Resolved for 3.4.x or earlier, no new info since then -> closing.