[rockstarzzz]

Wow, can't believe it has taken 2 pages worth of posts for this.
Dev Preview is a blessing in disguise for enthusiastic folks. Others should always stick on official roll out cycles. Trust me, you will still see more frequent updates (real ones - not "bug fixes") than any other platform on this planet, for a foreseeable future.

[MDK22]

If you recall, there were a few updates to DP for WP 8.1. Initially I had horrible battery life as well but this was resolved in subsequent updates of DP prior to updating the firmware. I expect the same for Update 1 as well. If IE is causing a battery drain, Microsoft will update DP before Update 1 is finalized.

YES, updates will come, but my (educated ?) guess would be driver issues related to the upgrade of IE. This is my personal opinion, and nothing more ... but, the first thing I noticed after update 1 was IE draining battery.

That being said, the execution of folders is nice, my start screen is covered with them, possibly move the title to the top ... and I've been waiting for the select delete function on SMS / MMS / Call History. ( I see select all is included in Call History, but NOT on SMS / MMS, perhaps an oversight, allows you to select all, then uncheck the few you want to keep)

[Maaz Mansori]

YES, updates will come, but my (educated ?) guess would be driver issues related to the upgrade of IE. This is my personal opinion, and nothing more ... but, the first thing I noticed after update 1 was IE draining battery.

That being said, the execution of folders is nice, my start screen is covered with them, possibly move the title to the top ... and I've been waiting for the select delete function on SMS / MMS / Call History. ( I see select all is included in Call History, but NOT on SMS / MMS, perhaps an oversight, allows you to select all, then uncheck the few you want to keep)

I see what you're saying, but wanted to make a few points. First, what changed in IE so significantly that it would require a firmware update? It's simply a web browser. Sure, they changed some browsers strings and such to improve compatibility and maybe they made some minor modifications to the core software that is causing memory leaks in some instances causing battery drain, but I don't see it as something that cannot be fixed in a future software update. Second thing is the update is in preview even before some carriers/phone models have distributed the previous version. I think the primary focus of update 1 is to fix any problems that were lingering from WP 8.1. The secondary focus is to add a few features that were not ready in time for WP 8.1's release. It does not change any of the primary functions of the phone so I honestly don't see why a firmware update would be necessary. But as you said, "We Shall See."

[MDK22]

If you were ever a Wintel Dev, you're familiar with the term 'DLL Hell' ... we shall see if drivers are needed to facilitate smoother execution in IE.

[MDK22]

Besides the fact, what we know as OS vs. Firmware ... it's all still CODE.

There are several different versions of IE (for PCs) depending on your core, 32 / 64 bit, OS, etc.
IE11 for WinPhone has to be all things to all devices, the drivers will customize the experience, based on hardware & core (read: SOC) from the Lumia 520 to the Lumia 1520 to the HTC ONE W8, etc.

Maaz, You look like an intelligent guy, a proverbial deep thinker ... There'll be a firmware update, I'll betcha a (virtual) million dollars ! or we shall see, I could be WRONG.

[MDK22]

UPDATE : too early to tell, but Battery seems to have settled down, this morning.
7% usage over the first 2 hours, this morning, we'll watch & see.

BTW changed NOTHING

[Kevin Rush]

Very good information about Developer Preview. I read all the comments and for the first time, feel comfortable trying the DP from WP 8.0.

[Maaz Mansori]

UPDATE : too early to tell, but Battery seems to have settled down, this morning.
7% usage over the first 2 hours, this morning, we'll watch & see.

BTW changed NOTHING

Interesting. I haven't noticed any battery drain on my 1520 as of yet. I still feel that a firmware update is unlikely and would only be issued as a last resort. I think at best, if any memory leaks are found in IE, it will be fixed in an update to Update 1 in the near future. I believe there is still supposed to be an Update 2 as early as October or November so considering the amount of time required for approval and the fact that they haven't even announced a firmware update yet, it would be more suitable to wait until Update 2. We know some new phones are going to ship with update 1 preinstalled and one of the reasons why is because some changes in Update 1 were needed to support phones such as the HTC One. If Update 2 is still coming later this year, carriers may opt to wait until then before approving the update meaning they may never push Update 1 and with any luck, we might get Update 2 and a firmware update (if required) approved by carriers in the December/January timeframe.
Anyway, we'll see what happens. This is all speculation, of course.