Flying squid

Please force a crash by pressing F3 + C for 10 seconds while ingame and attach the crash report ([minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt) here.

Still happens. Mostly when squid is swimming upwards, and then server connection lags, squid does not stop moving. Instead it will start flying and continues moving upwards. In your case, server started to lag and squid was moving at waterfall. (Experienced in vanilla server 1.6.2)

Update affects versions.

No response in 2 months, assuming no longer an issue.