Thread:Extension talk:WYSIWYG/Version of source bundles

It seems that links which refer to different source bundles of WYSIWYG extension have different versions number [they all have CKEditor 3.6 (revision 6902)]...

Version of WYSIWYG Source bundles, see Extension:WYSIWYG:

Comments: 1 and 2 abowe are close to each other. 3 is "completely" different on some parts.

I tried to compare contents of abowe bundles but it seems to be very difficult to determine what are the diffences, because there are so many (based on contents of file). On the other hand some of the differences are such that they do not have functional effect f.ex different amount of spaces in sentences of code. Where have these kind of differences come form?

I am little confused... am I loosing something when version of extension which I am using is "1.5.6_0 [B551]"? If we develop this extension further, what version should be used?

Modifications which I have made, are based on bundles 3, 4 (and partly 5) abowe.