[Scleros]

After upgrading to PuTTY v0.62 I began getting randomly disconnected with a bad string length error when SSH'n into Adtran 3200 series routers (running 15.11.00 GT firmware). From the log snippet below it looks to be related to flow control, but I'm not familiar with SSH enough to know if this is bug in PuTTY or Adtran's implementation. Anyone have any info on the issue?

Outgoing packet #0x148, type 2 / 0x02 (SSH2_MSG_IGNORE)
  00000000  00 00 00 00                                      ....
Outgoing packet #0x149, type 98 / 0x62 (SSH2_MSG_CHANNEL_REQUEST)
  00000000  00 00 01 00 00 00 00 22 77 69 6e 61 64 6a 40 70  ......."winadj@p
  00000010  75 74 74 79 2e 70 72 6f 6a 65 63 74 73 2e 74 61  utty.projects.ta
  00000020  72 74 61 72 75 73 2e 6f 72 67 01                 rtarus.org.
Outgoing raw data
  00000000  41 f4 da 9b 1f 9e 76 fb 2f 2f b8 f2 c3 26 de 04  A.....v.//...&..
  00000010  c1 9e 79 3b 2e 8e aa e9 70 47 48 4b 76 d5 6d c0  ..y;....pGHKv.m.
  00000020  a7 14 0f b9 15 d9 b1 59 e7 9e f0 17 5d 57 4b 8d  .......Y....]WK.
  00000030  64 34 b0 9c ea a0 ab 19 a0 b2 33 e4 12 fa 18 0c  d4........3.....
  00000040  10 b4 02 a0 76 08 35 29 da 63 72 57 b0 d7 34 7d  ....v.5).crW..4}
  00000050  37 49 ab c7 71 b5 e7 ed bb 77 56 fb 70 e1 93 95  7I..q....wV.p...
  00000060  e8 0c 07 09 0a 7e 6f e3 d0 38 79 c6 66 cd 6f 71  .....~o..8y.f.oq
Outgoing packet #0x14a, type 2 / 0x02 (SSH2_MSG_IGNORE)
  00000000  00 00 00 00                                      ....
Outgoing packet #0x14b, type 93 / 0x5d (SSH2_MSG_CHANNEL_WINDOW_ADJUST)
  00000000  00 00 01 00 00 00 20 16                          ...... .
Outgoing raw data
  00000000  ed 27 75 e6 18 66 e4 07 82 02 8a 0d 48 5c 09 e1  .'u..f......H\..
  00000010  36 e6 bb 5e 63 4b 1a ca 8e 4f 9a 0d 72 4a a9 3b  6..^cK...O..rJ.;
  00000020  bf 89 ad d7 20 46 cd 74 29 87 b0 f4 13 d1 92 e0  .... F.t).......
  00000030  e9 d3 3b a4 a9 f6 32 39 5f 9b 39 08 7d a6 dd 2c  ..;...29_.9.}..,
  00000040  a5 f2 93 c3 a9 b4 80 62 e8 6a ff 51 4a dc 0e 3e  .......b.j.QJ..>
Incoming raw data
  00000000  c9 19 1e 7d 92 83 fa f3 75 43 c6 0f 18 f3 c6 e2  ...}....uC......
  00000010  1b ad 32 70 98 fb 3e 05 5c 81 e7 73 33 e1 d0 7a  ..2p..>.\..s3..z
  00000020  71 3f f5 d4 4a 64 ad a5 1a 61 ca a6 9b 6a b7 6f  q?..Jd...a...j.o
  00000030  06 ab c9 d8 d6 59 af 26 1e 27 30 a2              .....Y.&.'0.
Incoming packet #0x1a4, type 1 / 0x01 (SSH2_MSG_DISCONNECT)
  00000000  00 00 00 02 00 00 00 11 42 61 64 20 73 74 72 69  ........Bad stri
  00000010  6e 67 20 4c 65 6e 67 74 68 00 00 00 00           ng Length....
Event Log: Received disconnect message (protocol error)
Event Log: Disconnection message text: Bad string Length
Event Log: Server sent disconnect message
type 2 (protocol error):
"Bad string Length"