Created attachment 191646 [details] result of : find . -iregex '.*\.\(\(dll\)\|\(exe\)\|\(pyd\)\)$' -type f -exec file {} \; | grep -v x86-64 The nightly build LibreOfficeDev_24.8.0.0.alpha0_Win_x86-64.msi for x86-64 contains 32 bit binaries. The total installed size is 3,6 MB.
Absolutely not a bug. We must provide binaries for 32-bit subsystem, because otherwise 32-bit apps running on 64-bit system won't be able to access the functionality (property pages, thumbnail preview, etc.) that needs loading of respective COM DLLs into the process.