While the general expectation is for Google to unveil Android 5.0 Key Lime Pie at its I/O conference in May, an Android 4.3 version has now popped up.

The new Android 4.3 build made an appearance in server logs with the same Jelly Bean name, suggesting that Google is pushing Jelly Bean for one more cycle before rolling out another major update.

According to Android Police, its server logs show hits from Nexus 4 and Nexus 7 devices running on "Android 4.3," also listed as "build JWR3B." The IP ranges from the hardware reportedly lead back to Google employees working with Android. Moreover, comments in Google's Chromium bug tracker also include references to software with theJWR3B build number.

Looking at the software build's initial letter, "J," Android Police suggests that Google's next Android release will come as another Jelly Bean rather than as a "K" (Key Lime Pie) release. The first letter of the build is also the first letter of the Android version name. Google reportedly doesn't stamp any version or build numbers to its internal test software, which means this Android 4.3 JWR3B build could see a public release soon.

Google's annual I/O developer conference is set for May and the company generally shares some big Android-related news at such events. Last year it introduced Android 4.1 at the Google I/O, and the year before that it unveiled Android 3.1.

Taking into account these recent Android 4.3 server log hits and the absence of any concrete evidence of Android 5.0 Key Lime Pie testing, it seems that Google plans to introduce a beefed up Android 4.3 Jelly Bean version at I/O.

It remains a mystery at this point just what features this Android 4.3 JWR3B release will pack, but a jump from Android 4.2 Jelly Bean to Android 4.3 Jelly Bean will probably not pack any major changes. Most likely, this update will be similar to the jump from Android 4.1 Jelly Bean to Android 4.2 Jelly Bean. That move included new features such as Gesture Typing, Photo Sphere and Multi-User support for tablets, but nothing revolutionary.

If Google introduces Android 4.3 Jelly Bean at I/O next month instead of the rumored Android 5.0 Key Lime Pie, the next major update will likely not come until later in 2013. This leaves October as a potential time frame, as Google introduced the Nexus 4, Nexus 10 and Android 4.2 around that time in 2012.