I have found a Place with a lot of this Pushup Bugs.
(When you fly through a Valley and it is pushing you up.)
I'm not alone with this bug. :>
http://youtu.be/aUgSv4-LyxI?hd=1
Cameni, have you added it to your bug list? I'm asking because I don't know if you have read my post with video on page 17 of topic.
I've had this bug several times, always in between valleys.
Here's my hardware specs
Operating System MS Windows 7 Ultimate 64-bit SP1
CPU Intel Core i3/i5/i7 @ 3.20GHz 43 °C
Sandy Bridge-E/EP 32nm Technology
RAM 31.9 GB DDR3 @ 800MHz (9-9-9-24)
Motherboard Gigabyte Technology Co., Ltd. X79-UD5 (SOCKET 0) 30 °C
Graphics Standard Monitor (2560x1440@101Hz)
DELL 2007FP (1600x1200@60Hz)
1280MB GeForce GT 560 Ti 448 37 °C
Hard Drives 234GB ATA Corsair Force 3 SCSI Disk Device (SATA)
59GB ATA Corsair Force 3 SCSI Disk Device (SATA)
977GB FUJITSU MARVELL Raid VD 0 SCSI Disk Device (SATA)
Optical Drives PIONEER BD-RW BDR-206 SCSI CdRom Device
Audio SB X-Fi Xtreme Audio