4.0 crashes on large PNG chunks. 4.0 does not include the functionality to view .png files, but there is a registry fix. 5.0 and 5.01 have broken OBJECT support. 5.01 prints palette images with black (or dark gray) backgrounds under Windows 98, sometimes with radically altered colors. 6.0 fails to display PNG images of 4097 or 4098 bytes in size. 6.0 cannot open a PNG file that contains one or more zero-length IDAT chunks. This issue was first fixed in security update 947864 (MS08-024). For more information, see this article in the Microsoft Knowledge Base: 947864 MS08-024: Cumulative Security Update for Internet Explorer. 6.0 sometimes completely loses ability to display PNGs, but there are various fixes. 6.0 and below have broken alpha-channel transparency support (will display the default background color instead). 7.0 and below cannot combine 8-bit alpha transparency AND element opacity (CSS – filter: Alpha (opacity=xx)) without filling partially transparent sections with black. 8.0 and below have inconsistent/broken gamma support. 8.0 and below don't have color-correction support.
4.0 crasHes on laRgE pnG chunks. 4.0 Does nOt IncluDe tHe fUNCTionality to View .pNG fileS, BUt tHere is a reGIsTRy fix. 5.0 and 5.01 hAVe bROken object supporT. 5.01 pRints paleTte imAGEs witH blaCK (oR dark grAy) baCKgrOUnDs UnDer wiNDoWS 98, sOmetiMes with rAdiCallY alteReD coLors. 6.0 FAilS tO DisPLay pNg ImageS of 4097 OR 4098 bytes in sizE. 6.0 caNnOt open a png File THAT cOntains oNe or More Zero-lEngtH iDat ChunkS. thiS issuE waS FirSt fixeD in secuRIty updATe 947864 (ms08-024). FOR more informatIon, See This arTiclE iN ThE micROSoft KnOWledge basE: 947864 ms08-024: cUmulaTIVE sECURIty uPdate for INterNet eXplorer. 6.0 soMetimeS completeLy loses AbiliTy tO DisplaY pngs, BuT thEre are vARIouS fIxES. 6.0 And BeLow hAve brokeN alpha-ChAnNel transPaREnCy support (WiLl displAy thE deFAuLt backGroUnd cOlor Instead). 7.0 aND bElow CANnOT comBINe 8-bit aLpHa trANsparEnCy and eleMENT opacItY (css – fiLtEr: AlPHa (opacity=Xx)) Without fILlINg PaRTIallY TrAnsparent sEctIoNS with BLacK. 8.0 anD below haVe inCOnSisTenT/broKen gAMMA suPpOrT. 8.0 And BelOW don't HAve Color-correctioN sUpPOrt.