1.7.2 server giving me errors. it dropped everyone's inv's and positions; Chest contents and blocks untouched as far as i can see.

"giving me errors" is no bug description.

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

and

Please attach the complete output of the "Development console" tab of the launcher.

• Click the text, press CTRL-A to select all, then CTRL-C to copy, and CTRL-V to paste in a comment on this ticket.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".