Release SuperTux 0.6.2-rc1 (release candidate; unstable)

NEWS.md

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 SuperTux Release and Development Notes
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-SuperTux 0.6.2-beta.1 (2020-04-30)
+SuperTux 0.6.2-rc.1 (2020-05-08)
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-The SuperTux Team is excited to announce the availability of the first beta release of SuperTux 0.6.2. This is an unstable pre-release that fixes a number of bugs that were reported after 0.6.1. It also features reworked graphics and levels. 
+The SuperTux Team is excited to announce the availability of the second beta release of SuperTux 0.6.2. This is an unstable pre-release that fixes a number of bugs that were reported after 0.6.1. It also features reworked graphics and levels. 
 
 Other changes include a power-up counter in the hud, new sprites for the door, a new tileset and several new badguys. But overall, this release is supossed to celebrate our anniversary (May 2000) with a little surprise Add-On, which can be found in the contrib levels!
 
+Since the last beta, the following things were changed:
+- A crash in levels with paths was fixed
+- A segfault that occurs on some graphics cards when `glFenceSync` is called, was fixed.
+- Translations were updated
+
+Please note that this is presumably the last release candidate before the final release.
 
 SuperTux 0.6.1 (2019-12-15)
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