R4i sdhc official site released the news that they have updated the firmware of R4i SDHC and R4i sdhc 3ds to V1.43b, make both of them support the DSi V1.43, you can update your card now.
About 2 days ago, they released the V1.42b firmwatr to make the R4i SDHC work on DSi V1.43
Today's V1.43b is mainly for R4i sdhc 3ds which is this card: http://www.digitopz.com/r4isdhc-3ds-flash-card-p-310.html After you use V1.43b to update your R4i sdhc 3ds card, you can use it to work on both DSi V1.43 and 3DS V2.1.0-4
Notice:
R4i sdhc is only for DS and DSi, can not work on 3DS
R4i sdhc 3ds can work on all of the DS and 3da consoles
Quote
To those who have R4i 3DS\R4i V1.41\R4i V1.42 card, the update of NDSi V1.43 have already been released, support NDSi V1.43 perfectly, please download the latest kernel to update your R4i card. Upgrade Instruction (2011-08-03)
R4i V1.43b Update:
1. Firmware upgrade to support NDSI 1.43(for products 1.41,1.42, 3DS).
2. Integrate firmware upgrade features. Goto config menu for firmware upgrading.
3. Fix display bug of Korean language.
4. Solved games:
5804 - Harry Potter and The Deathly Hallows: Part 2 (EU)
5798 - Brainstorm Series Treasure Chase (US)
5797 - The Sims 3 (US)
5796 - Kung Fu Panda 2 (US)
5795 - Devil Survivor 2 (JP)
5786 - Red Stone DS: Akaki Ishi ni Michibikareshi Monotachi (JP)
5785 - The Smurfs (US)
5782 - Nora to Koku no Koubou: Kiri no Mori no Majo (JP)
5780 - Petz Bunnyz Bunch (US)
5776 - Camp Rock: The Final Jam (US)
5769 - ATV Wild Ride (US)
5225 - Imagine: Resort Owner (EU)