Sign is transparent

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

Your report will be reopened or properly resolved as soon as we receive this information.

I have a similar problem (MC-103792), in version 1.10.
(started happening in 1.10 pre-releases and post-1.9 development versions.)
Signs become transparent after being cloned by a command block (options replace move)
Forced crash report follows:

Minecraft Crash Report ----
// This doesn't make any sense!

Time: 10/06/16 16:04
Description: Manually triggered debug crash

java.lang.Throwable
at bcx.az(SourceFile:1705)
at bcx.t(SourceFile:1626)
at bcx.av(SourceFile:968)
at bcx.a(SourceFile:396)
at net.minecraft.client.main.Main.main(SourceFile:124)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Thread: Client thread
Stacktrace:
at bcx.az(SourceFile:1705)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bnn['KevinTheDruid'/15607208, l='MpServer', x=-148.82, y=83.69, z=-23.37]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (0,106,0), Chunk: (at 0,6,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 851509068 game time, 10447405 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 34 total; [bnn['KevinTheDruid'/15607208, l='MpServer', x=-148.82, y=83.69, z=-23.37], wi['Pig'/15607276, l='MpServer', x=-164.51, y=68.00, z=-63.22], wi['Pig'/15607277, l='MpServer', x=-181.22, y=80.00, z=-27.51], wi['Pig'/15607274, l='MpServer', x=-177.81, y=80.00, z=-53.22], wi['Pig'/15607275, l='MpServer', x=-175.83, y=62.21, z=-8.92], wi['Pig'/15607272, l='MpServer', x=-188.75, y=77.00, z=-30.50], wi['Pig'/15607270, l='MpServer', x=-180.49, y=83.00, z=-60.23], wi['Pig'/15607271, l='MpServer', x=-184.27, y=80.00, z=-37.50], we['Cow'/15607268, l='MpServer', x=-187.21, y=81.00, z=-87.74], wi['Pig'/15607269, l='MpServer', x=-190.36, y=87.00, z=-46.75], we['Cow'/15607266, l='MpServer', x=-198.15, y=73.00, z=-7.84], wa['Bat'/20577205, l='MpServer', x=-180.83, y=28.07, z=14.92], we['Cow'/15607265, l='MpServer', x=-192.83, y=84.00, z=-74.61], wa['Bat'/20577206, l='MpServer', x=-171.25, y=34.10, z=9.75], wa['Bat'/20578986, l='MpServer', x=-134.75, y=33.48, z=-4.05], wa['Bat'/20578987, l='MpServer', x=-127.05, y=25.41, z=-7.11], wl['Sheep'/15607288, l='MpServer', x=-118.76, y=66.00, z=-31.50], wl['Sheep'/15607286, l='MpServer', x=-140.89, y=66.00, z=-57.52], wa['Bat'/20581923, l='MpServer', x=-122.80, y=30.28, z=12.40], wi['Pig'/15607284, l='MpServer', x=-140.52, y=66.00, z=-85.30], wi['Pig'/13220710, l='MpServer', x=-124.75, y=70.00, z=-57.50], we['Cow'/15607260, l='MpServer', x=-226.19, y=75.00, z=-61.54], we['Cow'/15607261, l='MpServer', x=-205.80, y=76.00, z=-49.50], wa['Bat'/20579323, l='MpServer', x=-71.02, y=25.97, z=38.68], wn['Squid'/20564976, l='MpServer', x=-105.52, y=61.49, z=18.94], wa['Bat'/20584944, l='MpServer', x=-120.09, y=22.70, z=-5.25], wn['Squid'/20564974, l='MpServer', x=-111.11, y=61.04, z=22.21], wn['Squid'/20575585, l='MpServer', x=-98.10, y=61.56, z=23.93], wn['Squid'/20575584, l='MpServer', x=-141.26, y=59.31, z=23.92], wn['Squid'/20575587, l='MpServer', x=-92.49, y=61.00, z=19.40], wa['Bat'/20579931, l='MpServer', x=-132.47, y=19.51, z=-49.63], wn['Squid'/20575583, l='MpServer', x=-141.14, y=56.86, z=22.37], wi['Pig'/10134256, l='MpServer', x=-128.74, y=69.00, z=-55.37], wa['Bat'/20578891, l='MpServer', x=-204.67, y=56.51, z=49.13]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Non-integrated multiplayer server
Stacktrace:
at bln.a(SourceFile:364)
at bcx.b(SourceFile:2535)
at bcx.a(SourceFile:405)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 1.10
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 444121256 bytes (423 MB) / 753926144 bytes (719 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.10
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 4600 GL version 4.3.0 - Build 20.19.15.4331, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (UK)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz

Broken Intel graphics card drivers, See MC-32606.