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Once again we have two sister releases: 1.8.7 "Tokyo" and 1.9.2 "Kyoto".
They both include additional security enhancements over the previous versions.
Although the addressed issues are not very likely to be exploited in a meaningful way, we still recommend that you upgrade for maximum security.
Version 1.9.2 "Kyoto" irons out the glitches remaining in the 1.9.x branch and we now consider 1.9.2 to be our new stable release. You may want to take this opportunity to upgrade to 1.9 if you're still using 1.8.x or an older version.
We also have packages which only contain modified files:
Upgrade instructions from 1.8.x to 1.9.x: http://manual.b2evolution.net/Upgrade_from_1.8.x_to_1.9.x
For example: upgrading from 1.9.0 to 1.9.2 only requires to replace the application files (attention: do not replace your /conf folder!).
The diff packages are now available. See above.
Yes! There have been numerous changes between 1.8.5 and 1.9.2, both in the DB and the files, otherwise 1.9.2 would just be called 1.8.8 or something.
There are DB changes to fix issues with long posts being truncated.
Yes! You actually *never* need a special upgrade file. These are only for people who want to download only the modified files between *minor* revisions.
Yes, all you need to do is install 1.9.3 (with option upgrade) then reapply your little mod.