I did the following in Pharo Launcher:
1. Select Official distributions > Pharo 6.1 (stable)
2. Click Create Image
3. Launch created image
4. Browse GLMAccumulator
5. Click on any method, e.g. activeEntity => method source is corrupt, e.g. mp: ‚tg 2/2/2010 22:03'
I tried it twice, also with the Pharo 6.0 > latest image.
Thanks for taking the time to try to confirm this. Did you use Pharo Launcher? I just tried it using get.pharo.org and don’t see the corruption. So it seems to be specific to Launcher somehow. :-/