I have found two game crashes upon updating this mod to the latest "STABLE" 1.9 build. There is a "server disconnect" when opening your survival inventory in singleplayer (i know, weird how it think it's a server) and when trying to join a multiplayer server it crashes the client. The way to avoid this, I found, is by going into singleplayer, opening up the inventory to get disconnected, then connecting to the server. This bug has consistently happened only once per launch of the game, as in once you get disconnected once, and reload the singleplayer world or connect to a server you have no more issues with it.

The second bug is similar but opposite. When dying in a world and clicking the respawn button, if in singleplayer the entire client crashes, if on a multiplayer server you do the same you only get disconnected from the server. This is not fixable by reloading the world. Researching the error I get tells me that the game is "trying to respawn the player in a dimension that no longer exists".

Removing exclusively this mod fixes the inventory issue and changes the respawn crash report to say "ticking connection" which is supposedly caused by outdated Java versions. I have the latest java version, so I figured it became corrupt somehow and I reinstalled it; after reinstalling java 8u151 I have yet to test the respawn crash again.

The following are client logs from singleplayer crashes of these bugs:

Inven Crash.txt
Respawn Crash.txt
New Text Document (4).txt

I have not had these issues prior to updating Galaxy Space from the first version (1.1.0 STABLE) to the latest version.
Additionally I had to update from galacticraft 463 to 502.
This is in 1.7.10 Minecraft

UPDATE: The inability respawn bug IS NOT a galaxy space issue. Taking out galaxyspace yielded the issue as some strange incompatibility with (particularly) Galacticraft 3.0.12.502 and Legendgear 2...Galacticraft 3.0.13.463 had no such issues.
Thus meaning Galacticraft is the issue for that gamebreaking bug if legend-gear 2 is installed.

HOWEVER...the inventory causing a "fatal error" to occur and thus disconnecting the player from singleplayer upon opening the survival ivnentory (and crashing the client if done in SMP) is caused by GalaxySpace 1.1.9 . Removing the mod from my folder removes the issue. After playing around with 1.1.8 and having 1.1.0 previously, both do not have this issue; it was introduced in 1.1.9 .