[Optimus One, P500, V General] Bonoboo:
Current bugs in Jelly Bean for LG P500

Official 4.3 changelog here and here

Bugs in CM10.2 (4.3)

– Wi-Fi speed 4x times slower, but sometimes boosts

– Wi-Fi wakelock → battery drain (at least disable Settings > Wi-Fi > menu > Advanced > Scanning always available to avoid all-time wakelock)

– Wi-Fi sleep policy

– Can't connect to ad-hoc network

– Long "connecting" to internet after boot when on Wi-Fi > need to toggle it

– Low brightness in Camera and other apps, max exposure +3

– Live wallpapers disabled: LiveWallpapersPicker.apk located in ZIP/extras needs to move manually in /system/app. Works only from Play Store, not stock.

– Sometimes numpad for SIM or lockscreen PIN-code very small

– Huge lags and FC's when SIM-card not installed. Solution: enable airplane mode

– Mounts2SD wont work in easy way. Link2SD fine

– Problems with Halo feature (where available)

– Some apps can't show network speed

– Disappeared option for enable navigation panel (caused CM changes). How to enable

– Navigation bar (buttons) very thin

– Video recording now can be paused but if resume Camera app crashes.

– SMS popup windows now very small – CM bug

Fixed / working (4.3):

– fixed indication of transmitting / receiving data on Wi-Fi and cell network (small arrows)

– fixed Bluetooth: A2DP, sending/receiving files

– fixed internal Wi-Fi hotspot, can be launched once till reboot

– fixed FM radio support

– fixed loudspeaker

– fixed no APN's problem

– fixed lockscreen player controls

– fixed switching tracks by volume buttons

– fixed adjustment exposure when recording video

– fixed flickering in camera when overclocking enabled

– fixed no access to SMS on SIM-card (stock and 3rd party apps)

– fixed on-line Voice Search, FC some games, ringtone editors and WhatsApp notification sound

– Offline charging

– USB tethering

– Hardware video and 3D acceleration

– YouTube HQ video playback

– Project Butter (3x buffering, real vsync → smooth)

– Overclocking up to 864 MHz

– Photo (but dark without changing exposure)

– Video recording (only 320x240, on stock was 640x480)

– Live panorama (slowly)

– Data usage and limit

– GPS

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Official 4.2.2 changelog here.

Bugs in CM10.1 (4.2.2)

– Wi-Fi wakelock → battery drain

– Wi-Fi sleep policy

– Can't connect to ad-hoc network

– Low brightness in Camera and other apps

– Routing music to Bluetooth via A2DP

– Bug with navbar when screen rotates. Need change DPI

– Live wallpapers disabled: LiveWallpapersPicker.apk located in ZIP/extras needs to move manually in /system/app. Works only from Play Store, not stock.

– Flickering in camera when overclocking enabled

– Sometimes numpad for SIM or lockscreen PIN-code very small

– Huge lags and FC's when SIM-card not installed. Solution: enable airplane mode

– Internal Wi-Fi hotspot can be toggled only once at one session. Then needs reboot

Fixed / working (4.2.2):

– Calls

– Data

– Loudspeaker in call

– Offline charging

– Bluetooth (may not connect to some devices)

– FM Radio (also added simple stock app)

– USB tethering

– Bluetooth tethering (?)

– Stock pie controls

– Hardware video and 3D acceleration

– YouTube HQ video playback

– Project Butter (3x buffering, real vsync → smooth)

– Overclocking up to 864 MHz

– Photo (but dark without changing exposure)

– Video recording (only 320x240, on stock was 640x480)

– Live panorama (slowly)

– Data usage and limit

– GPS

– Google Now (how to install, but with limited support)

– Voice shutter in camera (needs installed Voice Search app)

– Fixed graphics lag in some apps when any keyboard appears / gone

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Common bugs due old processor architecture (4.2.2 / 4.3):

– Offline voice recognition

– Swipe in stock keyboard

– HDR photo merging

– "Slow" video recording (timelapse)

– Capturing 360° panoramas: for this needed gyroscope too

– Some photo editing effects in Gallery

Maybe missed something.