hahaha. well, i guess u learned the hardway.

1. well, bouncing backward is used on certain condition, not all, and it is VERY BAD, because u going to blind unprepared people behind u. hahahahaha. Yes, bouncing behind usually is used for large apperture. eg:2.8 and below. but with another condition is that, the room MUST be poorly lit. meaning, it must have less natural light (like those ballroom, they are brightly lit with tungsten, very badddd,... again, read #4.)
2. urghhh... if u are inexperince, dont. because worst part is u are bouncing backwards, thus, u may not have a consistent distance of bounce area to bounce back the light, u might get 10% light back, or 30%, or 60%, or just 5%, thus ur exposure will be in a MESS.
3. erm... u really need to learn and understand the Custom WB urself. it takes time.... else, set it to AWB and let the bionz do thier job. usually if u see on ur LCD< it will have 50% more red. once u bring back to ur computer LCD< the proper color is there, it wont be That Red u see on ur camera lcd. (forgot to tell u, the camera lcd for A300 series is 50% more red)

4. now you know. it's like, if ur room light is blue, after flash (photo should be white) but the blue light travel pretty fast too, 1/60 prehaps enough to cause a 40% overwrite of blue light, hence, u will get a 40% cooler(blue) photo

so, ballroom usually is over lit with tungsten, red=orange, warmer light.... so, imagine when u uses F2.8, the amount of orange will be overwrite ur photo would be 20-40%... so most of ur photo are more 'warm' by about 20-40%...

so it is ur technique, not the camera limitation.... u lack of knowledge and experince.

also, that is the reason (i assumed) that the guys asked u to get to 5000k, but if me, i would use a gel card instead if i wan a proper overall WB

5. sigh, i am lazy to list laaa.... nikon and canon numbering is quite mess... sony also la... LOL

entry level
Canon 450D, 1000D, 500D
Nikon D60, D90, D5000, D3000
Sony A300, A330, A550?

Mid Level
Canon 40D, 50D (see the number is 2 digit, like nikon entry level)
Nikon D300, D700, D300s (see the number is 3 digit, like canon's entry level numbering)
Sony A700, A850

Pro level... no need tell la... u wont be getting it any soon also

so did u see that the 40D are mid level, and the cost so much, it could buy 2 and a half sets of ur camera... would u prefer getting 1x 40D or 2.5 sets of ur current camrea?

jimlim007: Post a blur photo with EXIF. If the shutter speed is too slow it is operator error. Figure out what you are doing wrong before blaming the camera!

How long have you had your camera? How can you not know about the Local Area AF thing? You use the joystick to select AF point.

You need to spend more time with your camera. Bring it out everywhere, friends' birthdays etc. Then you will have experience, and when you need to shoot at a ballroom, you know how.

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Added on November 28, 2009, 8:57 am

Not sure in Malaysia  , but bought mine from ebay approximately RM 700.

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Added on November 28, 2009, 9:01 am

You may stop the growth, but not remove them from the lens surface, still need to be cleaned up.