We guess we have fixed the 502 error. Not sure, the problem is maybe cause the third-part component, maybe cuase by server conifgue. You know the problem is very hard to see, so it is hard to fix. We have some codes to moinor this problem. If it is not go in one week, I think we have fixed it. It is Ok to post a topic when you find it. The built date is 30/10(check the about dialog), if not, try to ctrl+f5 1. Type Schematic suffix lower case: Properties > Custom Attributes always UPPER CASE <https://easyeda.com/bbs_view_458.htm> 2. Four Pins Mosfet (D G S B) symbols/models <https://easyeda.com/cgi/_Cxphdq/bbs_view_429.htm> 3. Trace time last 10 decimal places weird! <https://easyeda.com/bbs_view_423.htm> 4. No Schematic Design Manager in Chromium <https://easyeda.com/bbs_view_325.htm> 5. XY flip in PCB is dangerous! <https://easyeda.com/bbs_view_306.htm> 6. S Hotkey does not place 'TEXT' in PCB <https://easyeda.com/bbs_view_288.htm> 7. DRC = Design Rules Check <https://easyeda.com/bbs_view_318.htm> 8 A cute *arrow head* under "Drawing tools". And we have fixed some problems which provided by Sancho, such as provide "Public" or "private" label for Sancho <https://easyeda.com/project_user_example_1.htm> and some others, I can't remember. there are not bugs or feature, It is a litter hard to track. Next step, we will try to <https://easyeda.com/bbs_view_490.htm> and provide better "EasyEDA libs" Thanks.